when positive integer x is divided by positive integer y , the remainder is 7 . if x / y = 86.1 , what is the value of y ?
"when positive integer x is divided by positive integer y , the remainder is 7 - - > x = qy + 7 ; x / y = 86.1 - - > x = 86 y + 0.1 y ( so q above equals to 86 ) ; 0.1 y = 7 - - > y = 70 . answer : c ."
divide(7, subtract(86.1, floor(86.1)))