the radius of the two circular fields is in the ratio 3 : 7 the area of the first field is what percent less than the area of the second ?
"r = 3 ï € r 2 = 9 r = 7 ï € r 2 = 49 49 ï € â € “ 40 ï € 100 - - - - ? = > 81.6 % . answer : e"
subtract(power(7, const_2), power(3, const_2))