425 kurang 20% hasilnya berapa

425 - 20%
= 42500/100 - 20/100
= 42480/100
= 42480% = 424,8

425-20/100
=425-1/5
=425×5-1/5
=2.125/5-1/5 (Disamakan penyebutnya)
=2.124/5
=424,8