(12½%×6 lusin)+(12½‰×10 gros)=...buah.

(12 1/2% × 6lusin)
= 12,5% × 6lusin
=125/1000 × (6×12) = 125/1000×72 = 9000/1000 = 9buah
(12 1/2% × 10 gross)
= 12,5% × 10 gross
= 125/1000 × (10×144 buah) = 125/1000 × 1440
= 125/100 × 144
= 18.000/100
=180 buah
(12 1/2% × 6lusin) + (12 1/2% × 10gross)
=9buah + 180 buah
=189 buah
*Semoga membantu

(12,5°/•×6 lusin)+(12,5°/••×10 gross) = (12,5/100×6×12)+(12,5/1000×10×144) =
(1/8×72)+(1/80×1440) = 9+18=27 buah