Mathematics for IGCSE & O level - Percentages (Section 1 - No. 39)
If the original price of a product is 'P', and there's a discount of 'D' percent, what is the sale price?
P - D
P * (1 - D/100)
P * (1 - D)
P - (P * D/100)
解释
The final price involves calculating the amount off and subtracting it.