40 % of a number is more than 20 % of 650 by 190 . find the number ?
"( 40 / 100 ) * x – ( 20 / 100 ) * 650 = 190 2 / 5 x = 320 x = 800 answer : c"
divide(multiply(add(divide(multiply(650, 20), const_100), 190), const_100), 40)