Respuesta :
You would have to make the numbers have the same denominator. So you would have -15/20 + 4/20
Then you would have to put the sign of the higher number on it, So you would have -15/20 + 4/20 = -11/20
Then you would have to put the sign of the higher number on it, So you would have -15/20 + 4/20 = -11/20