two numbers are respectively 12 % and 60 % more than a third number . the percentage that is first of the second is ?
"i ii iii 112 160 100 160 - - - - - - - - - - 112 100 - - - - - - - - - - - ? = > 70 % answer : c"
subtract(const_100, multiply(divide(add(12, const_100), add(60, const_100)), const_100))