tolong yang baik bantu aku nomer 17 , 19 , 20 pakai caranya yaa......;)

17. harga jual
(100% + 25%) harga beli
harga beli = harga jual / 125%
= 100 / 125 × 225.000
= b. Rp180.000
19. Bruto = 150kg
Tara = 2% × 150 = 3kg
Neto = bruto - tara
= 150 - 3
= 147kg
harga jual
= neto × harga jual/kg
= 147 × 10.000
= 1.470,000
harga beli
= 450.000 × 3
= 1.350,000
untung
= harga jual - harga beli
= 1.470,000 - 1.350,000
= c. Rp 120.000