Complex sentence: A large proportion of public school teachers are Kuwaiti females, particularly at the primary level, with only 4 percent being older than 45 years compared to 35 percent of non-Kuwaiti males.
Split into simpler sentences: A large proportion of public school teachers are Kuwaiti females, particularly at the primary level. Only 4 percent of women teachers are older than 45 years, compared to 35 percent of non-Kuwaiti males.