Christianity in Russia is by some estimates the largest religion in the country, with nearly 50% of the population identifying as Christian.
 The largest tradition is the Russian Orthodox Church.
 According to official sources, there are 68 eparchies of the Russian Orthodox Church.
 There are from 500,000 to one million Old Believers, who represent an older form of Russian Orthodox Christianity, and who separated from the Orthodox Church in the 17th century as a protest against Patriarch Nikon's church reforms.
In Australia, Buddhism is a small but growing religion.
 According to the 2006 census, 2.1 percent of the total population of Australia, or 418,749 people, identified as Buddhist.
 It was also the fastest-growing religion by percentage, having increased its number of adherents by 79 percent between the 1996 and 2001 censuses.
 Buddhism is the second largest religion in the country after Christianity.
Christianity is and has been the largest religion in Ireland.
 Most Christian churches are organized on an all-Ireland basis, including both the Republic of Ireland and Northern Ireland.
 In the Republic of Ireland, 84.2% of the population adheres to the Catholic Church.
 In Northern Ireland, the various branches of Protestantism collectively form a majority of the population but the single largest church is the Catholic Church which accounts for some 40.8% of the population.
Islam in Albania mainly arrived during the Ottoman period when the majority of Albanians over time converted to Islam and in particular two of its denominations: Sunni and Bektashi (considered by some to be Shia).
 Following the Albanian National Awakening (Rilindja) tenets and the deemphasizing of religion during the 20th century, the democratic, monarchic later the communist governments followed a systematic dereligionization of the Albanian nation and national culture.
 Due to this policy as with all other faiths in the country, Islam underwent radical changes.
 Decades of state atheism which ended in 1991 brought a decline in religious practice in all traditions.
 The post-communist period and the lifting of legal and other government restrictions on religion allowed Islam to revive through institutions that generated new infrastructure, literature, educational facilities, international transnational links and other social activities.
 According to 2011 census, 58.79% of Albania's population adheres to Islam, making it the largest religion in the country.
 Due to the communist legacy of religious persecution contemporary Muslim Albanians in Albania are cultural Muslims with religious Muslim practices being minimal for most people.
 The remaining population either belongs to Christianity, which is the second largest religion in the country practiced by 24.99% of the population, or is irreligious.
Christianity is the largest religion in Northern Ireland.
 According to a 2007 Tearfund survey, Northern Ireland was the most religious part of the UK, with 45% regularly attending church.
The main religion traditionally practiced in Latvia is Christianity.
 s of 2011 , it is the largest religion (80%), though only about 7% of the population attends religious services regularly.
 Lutheranism is the main Christian denomination among ethnic Latvians due to strong historical links with the Nordic countries and Northern Germany (see Hanseatic League), while Catholicism is most prevalent in Eastern Latvia (Latgale), mostly due to Polish influence.
 The Latvian Orthodox Church is the third largest Christian church in Latvia, with adherents primarily among the Russian-speaking minority.
Catholic Christianity is by far the largest religion in Spain.
 According to a study by the Spanish Centre for Sociological Research, in June 2017 69.8% of Spaniards self-identify as Catholic Christians, 2.9% as followers of other faiths (including Islam, Protestant Christianity and Buddhism etc.), and 24.9% identify as atheists or non-believers.
 Most Spaniards do not participate regularly in religious worship.
 This same study shows that of the Spaniards who identify themselves as religious, 57.8% barely ever goes to mass, 16% go to mass few times a year, 9.7% few times per month and 15.1% every Sunday or multiple times per week.
 Although a majority of Spaniards are Catholics, most, especially those of the young generation, ignore the Church's moral doctrines on issues such as pre-marital sex, sexual orientation or contraception.
 The total number of parish priests has shrunk from 24,300 in 1975 to 19,307 in 2005.
 The number of nuns also dropped by 6.9% to 54,160 between 2000 and 2005.
As of the early 21st century, Christianity has more than 2.4 billion adherents, out of about 7.2 billion people.
 The faith represents one-third of the world's population and is the largest religion in the world, with the three largest groups of Christians being the Catholic Church, Protestantism, and the Eastern Orthodox Church.
 The largest Christian denomination is the Catholic Church, with 1.09 billion adherents.
 The second largest Christian branch is either Protestantism (if it is considered a single group), or the Eastern Orthodox Church (if Protestants are considered to be divided into multiple denominations).
Christianity is the largest religion in Norway.
 Norway has historically been called a "Christian country".
 A majority of the population are members of the Church of Norway with 71.5% of the population officially belonging to the Evangelical Lutheran Church of Norway in 2016.
 At numerous times in history, Norway sent more missionaries per capita than any other country.
 This changed considerably from the 1960s.
 In 2004, only 12% of the population attended church services each month.
 Citizens born in Norway to one or two Norwegian parents are automatically added to the list of Protestant Christians in Norway, and are required to "sign out" of the church.
 There are two categories kept in the church's books, "medlemmer" (members) and "tilhørige" (belonging to [the State church]).
 Members technically have to be baptised, whereas "tilhørige" are to be taken out of the books if not baptised by the age of 18.
 Norwegian citizens' tax funds are given to the Protestant Church until one registers as a member of another religious group, or as a member of the Humanist association.
Christianity is one of the major religions practiced in Zimbabwe.
 The arrival of Christianity dates back to the 14th century by missionaries such as Robert Moffat of the London Missionary Society (LMS).
 Christianity is embraced by the majority of the population.
 It is estimated 85 percent of Zimbabweans claim to be Christians, with approximately 62 percent regularly attending church services.
 Christian faith plays a very important role in the organization of our society; the bible is regarded as the only source of hope and truth.
 It is highly esteemed and its writings considered sacred.

Question: Christianity in Irleand is the largest religion. Specifically, the Religion in Northern Ireland is comprised in percentage to those regularly attending church?
Answer: 45%