In Reply to: ai giỏi math, giúp dùm posted by DG on Dec 24, 2020 at 14:27:53:
Cái này còn phải tùy terms of the discount. Can the 20% be combined with the 50%? Usually the answer is no, only 1 applies.
If only 1 discount applies, thi` original price la` $97.5, take off 50% co`n $48.75 so her calculation is correct.
If both discount can applies, thông thường 50% off applies AFTER all other discount. Cho nên 97.5 applies 20% còn $78, applies thêm 50% còn $39.