evaluate : 28 % of 400 + 45 % of 250
explanation : 28 % of 400 + 45 % of 250 = ( 28 / 100 * 400 + 45 / 100 * 250 ) = ( 112 + 112.5 ) = 224.5 answer b
add(divide(multiply(400, 28), const_100), divide(multiply(45, 250), const_100))