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1 lusin = 120.000/3
= 40.000
1 lusin = 12 buah
9 piring = 9/12 x 40.000
= 10.000
maaf kalau salah , semoga membantu
Ditanya. : Harga 9 piring
Jwb : 1 Lusin = 12 piring = 40.000 (120.000:3)
jdi 3 Lusin = 36 piring
3/4 Lusin = 9 piring
jdi 3/4×40.000 = 30.000
jdi harga 9 piring = 3/4 Lusin × harga 1 Lusin
maaf klo salah