if 0.8 of a number is equal to 0.09 of another number , the ratio of the numbers i
"sol . 0.8 a = 0.09 b â ‡ ” a / b = 0.09 / 0.8 = 9 / 80 = . â ˆ ´ a : b = 9 : 80 . answer c"
divide(multiply(0.09, const_100), multiply(0.8, const_100))