50% kali 2,5 - 1/5 =

50/100 × 2,5 - 1/5 = 0,5×2,5-0.2 = 1,05



maaf kalau salah

50% × 2,5 - 1/5

50/100 × 25/10 - 1/5

50×25/100×10 - 1/5

1.250/1.000 - 1/5

1.250×5/1.000×5 - 1×1.000/5×1.000

6.250/5.000 - 1.000/5.000

5.250÷10/5.000÷10

525÷25/500÷25

21/20


pecahan biasa = 21/20

persen = 105%

pecahan campuran = 10 1/20

Desimal = 1,05