Question:  Isabelle's ghost bat is found in a country that covers how much of the continent's land area?

Context paragraphs:
Lesser ghost bat: The lesser ghost bat ("Diclidurus scutatus") is a bat species found in northern Brazil, Colombia, Ecuador, French Guyana, Guyana, Peru, Surinam, and Venezuela.

Brazil: Brazil ( ; Portuguese: "Brasil" ] ), officially the Federative Republic of Brazil (Portuguese: "República Federativa do Brasil" ,    ), is the largest country in both South America and Latin America.  As the world's fifth-largest country by area and sixth by population, it is the largest country to have Portuguese as an official language and the only one in the Americas.  Bounded by the Atlantic Ocean on the east, Brazil has a coastline of 7491 km It borders all other South American countries except Ecuador and Chile and covers 47.3% of the continent's land area.  Its Amazon River basin includes a vast tropical forest, home to diverse wildlife, a variety of ecological systems, and extensive natural resources spanning numerous protected habitats.  This unique environmental heritage makes Brazil one of 17 megadiverse countries, and is the subject of significant global interest and debate regarding deforestation and environmental protection.

Baseball doughnut: A baseball doughnut is a weighted ring that fits over the end of a baseball bat, used for warming up during a baseball game.  A doughnut is thought to help increase bat speed.  Doughnuts can weigh as little as 4 oz.  and as much as 28 oz.  Players feel baseball doughnuts increase bat velocity because after warming up with a baseball doughnut then decreasing the weight after taking the doughnut off, the swing feels faster.  The heavier load of the weighted bat stimulates the neural system and increases muscle activation during lighter bat swings.  Researchers have found that muscle contractions are stronger after reaching near maximal loads.  One research study also found that additional weight added to the bat may strengthen the muscles of the forearms and wrists.  Baseball doughnuts are based on the theory of complex training, which alternates the use of heavier and lighter weights to increase explosive power.  By increasing the number of motor units recruited this training increases muscle performance.

Ghost bat: The ghost bat ("Macroderma gigas"), also known as the false vampire bat, is a bat native to Australia.  The bat is named for the extremely thin membrane of its wings that makes it appear ghostly at night.  Ghost bats have grey fur on their backs and pale grey or white fur on their undersides.  They have long, narrow wings, but no tail, averaging 11 cm in length.  Females are generally smaller than males. Ghost bats have large ears for long distance hearing, and very sharp teeth so they can attack prey.

Isabelle's ghost bat: Isabelle's ghost bat ("Diclidurus isabella") is a bat species found in northwestern Brazil, Guyana, and Venezuela, and possibly Colombia.  It was discovered in October 1916 by Emilie Snethlage, and described by Oldfield Thomas in 1920.

Entebbe bat virus: Entebbe bat virus in an infectious disease caused by a "Flavivirus" and is closely related to yellow fever.  Entebbe bat virus is a (+) single-stranded RNA (ssRNA) genome virus.  It is an enveloped virus with icosahedral nucleocapsid.  Its genome has approximately 10,000 to 12,000 kilobases.  Entebbe bat virus was first isolated from a little free-tailed bat ("Chaerephon pumilus") in Uganda in 1957, but was not detectable after initial isolation.  In 2011, Entebbe bat virus was isolated from a free-tailed bat captured from the attic of a house where it had been originally found.  Infectious virus was recovered from the spleen and lung, and the viral RNA was sequenced and compared with that of the original isolate (Kading et al. 2015).  Not much is known about the symptoms that the virus causes, and it is unknown if the virus can infect humans.  Entebbe bat virus was initially a mosquito-borne pathogen that was able to infect bats and use them as reservoirs for the virus.  However, the virus does not seem to have any existing adverse side effects on its host.

Mount Etna Caves National Park: Mount Etna Caves is a national park in Central Queensland, Australia, 544 km northwest of Brisbane.  The park's caves are the roosting site for more than 80 percent of Australia's breeding population of little bent-wing bats.  It is also one of the few places in Australia supporting a colony of the endangered Ghost Bat.

Greater ghost bat: The greater ghost bat ("Diclidurus ingens") is a bat species found in northwestern Brazil, southeastern Colombia, Guyana, Peru, and Venezuela.

Northern ghost bat: The northern ghost bat ("Diclidurus albus") is a bat species from South America, Trinidad, and Central America.  It is a relatively rare, completely white, insectivorous bat, with an unusual sac at the base of its tail.  Specimens infected with rabies have been found in Trinidad.

Asia: Asia ( ) is Earth's largest and most populous continent, located primarily in the Eastern and Northern Hemispheres.  It shares the continental landmass of Eurasia with the continent of Europe and the continental landmass of Afro-Eurasia with both Europe and Africa.  Asia covers an area of 44,579,000 km2 , about 30% of Earth's total land area and 8.7% of the Earth's total surface area.  The continent, which has long been home to the majority of the human population, was the site of many of the first civilizations.  Asia is notable for not only its overall large size and population, but also dense and large settlements as well as vast barely populated regions within the continent of /1e9 round 1 billion people, or roughly 60% of the world's population.

Supporting paragraphs: Isabelle's ghost bat Brazil
Answer: 47.3%