Rugi = persentase rugi × harga beli
Rugi = harga beli – harga jual
maka harga beli – harga jual = persentase rugi x harga beli
Hb – Rp10.800.000,00 = 10% × Hb
10 Hb – Rp10.800.000,00 = 100 x Hb
Hb – Rp10.800.000,00 = 0,1 Hb
Hb – 0,1
Hb = Rp10.800.000,00
Hb = Rp10.800.000,00 Hb = Rp10.800.000,00 %3D
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10 Hb = Rp10.800.000,00 x %3D