jika 3 lusin kaus kaki RP.990.000,00 mka harga 25 kaus kaki

3 lusin = Rp990.000,-
(3x12) = Rp990.000,-
36 = Rp990.000,-
1 kaos kaki = Rp 990.000,- ÷ 36
1 kaos kaki = Rp27.500,-
25 kaos kaki = Rp27.500,- x 25
25 kaos kaki = Rp687.500,-
semoga membantu

1 lusin = 12 kaus kaki
3 lusin = 12×3=36
990. 000:36 =27. 500(harga satu kaus kaki)
Jadi harga 25 kaus kaki 27. 500×25=687. 500