if x is 20 percent greater than 12 , then x =
"x is 20 % greater than 12 means x is 1.2 times 12 ( in other words 12 + 20 / 100 * 12 = 1.2 * 12 ) therefore , x = 1.2 * 12 = 14.4 answer : e"
add(12, multiply(divide(20, const_100), 12))