the difference between a number and its two - fifth is 510 . what is 30 % of that number ?
"let the number be x . then , x - 2 / 5 x = 510 x = ( 510 * 5 ) / 3 = 850 10 % of 850 = 255 . answer : c"
divide(multiply(510, add(const_4, const_1)), add(const_1, const_2))