This is the 3rd scenario for PSLE Maths – 5 Common Questions for Percentage.
Scenario 3: GST, Discount, Interest
Useful tip: GST and Interest amounts are percentage increase on the original price. To get the final amount, you need to add the increase to the original amount.
On the other hand, discounts are percentage decrease on the original price. To get the final amount, you need to minus the discounts off the original amount.
Susan is selling her blouse for $50. One day, she decided to raise the price by 10%. However, her customer felt that the price was too steep so she decided to give a discount of 5%.
a. How much is the blouse now?
b. If there is additional 7% GST, how much will the blouse cost now?
Below is a video showing the explanation for question 3. This video will give you an idea on how to attempt similar questions.
I have also created a percentage worksheet that gives more questions on this type of question. Do try the questions and make sure you know how to do them.
You can view the worksheet here.