jawab kaka makasih....

150.000x20%
150.000x20/100
150.000x1/5
30.000= diskon Jaka

Total bayar=150.000-30.000= 120.000

150.000 x 20/100 =
150.000 x1/5 = 30.000
Yang harus Ia bayar = 150.000-30.000 = 120.000