Question

que numero debemos sumar a 1/2 para obtener 3/5

Answer 1

el numero = x
x+1/2 = 3/5
x = 3/5 -1/2
x = (6-5)/10
x = 1/10

comprobacion
1/10 +1/2 = 3/5
(1 +5)/10 = 3/5
6/10 = 3/5
3/5    =3/5