Respuesta :

faizu
let the unknown number be a ..
so ..
8% of a = 120
=> 8/100 * a =120
=>2/25 a = 120 
=>2a = 120*5 
=>2a = 3000
=> a = 3000/2
=> 1500 ..

so 8% of 1500 = $120 ..

hope it helps !!!!