if 0.4 of a number is equal to 0.06 of another number , the ratio of the numbers is :
"expl : 0.4 a = 0.06 b - > a / b = 0.06 / 0.40 = 6 / 40 = 3 / 20 : . a : b = 3 : 20 answer : c"
divide(multiply(0.06, const_100), multiply(0.4, const_100))