Diketahui laba:pembelian = 3:9,jika harga penjualan Rp.480.000,berapa harga pembelianya?

3/9 × 480.009
= RP. 160.000
semoga membantu maaf jika salah

HB = harga beli
HJ = harga jual
LB = laba
HB = HJ - LB
9x = 480.000 - 3x
9x + 3x = 480.000
12x = 480.000
x = 40.000
Harga beli = 9x = 9(40.000) = 360.000