enrollment in city college in 1980 was 85 / 3 percent of enrollment in 1990 . what was the percent increase in the college ’ s enrollment from 1980 to 1990 ?
assume 100 enrollments present in 1990 85 / 3 % of 1990 = enrollments on 1980 enrollments on 1980 = 28.33 % change = ( enrollment in 1990 - enrollment in 1980 ) * 100 / ( enrollment in 1980 ) = ( 100 - 28.33 ) * 100 / 28.333 = 7166.67 / 28.333 = 253 % ans - d
multiply(divide(subtract(const_100, divide(85, 3)), divide(85, 3)), const_100)