Mathematics for IGCSE & O level - Percentages (Section 2 - No. 42)
If the price of an item is increased by 5% and then by another 10%, what is the overall percentage increase?
15%
15.5%
16%
16.5%
คำอธิบาย
Let the original price be 100. Increase by 5% --> 105. Increase 10% of 105 = 10.5. Therefore the new total is 115.5. Percentage increase is 15.5%