Question

Penjualan seratus delapan puluh rupiah. Rugi 10 persen. Berapa pembelianya

Answer 1

Verified answer

Penjualan (p) = Rp 180,00
persentase rugi = 10%
pembelian (b) = ....???

rugi = b - p

persentase rugi = (b - p)/b × 100%
10% = (b - 180)/b × 100%
10% = (100b - 18.000)/100b
100b - 18.000 = 10% × 100b
100b - 18.000 = 10/100 × 100b
100b - 18.000 = 10b
100b - 10b = 18.000
90b = 18.000
b = 18.000/90
b = Rp 200,00


Jadi pembeliannya adalah Rp 200,00