Question

¿Que numero disminuido en 20% es 352?

Answer 1

El numero = x
x - 20% x = 352
x - 20x/100 = 352
100x/100 - 20x/100 =352
80x/100 =352
80x =352*100
x = 35200/80
x = 400
  el numero es el 440

Answer 2

x - (20/100)x = 352 x - (1/5)x = 352 (4/5)x = 352 x = 352:(4/5) x = 440