HOTS Mathematics Primary 5 Money

Mr Tan wants to buy a laptop from a NTUC FairPrice electronics sale. The original price of the laptop is $2,000. The laptop is first given a 15% discount, and then 9% GST is charged on the discounted price. How much does Mr Tan pay for the laptop in the end?

A $1,700
B $1,853
C $1,880
D $2,180
Show Worked Solution

Worked Solution

Step 1: Find the discounted price after 15% discount. Discount = 15% of $2,000 = 0.15 × $2,000 = $300 Discounted price = $2,000 − $300 = $1,700 Alternatively: Discounted price = $2,000 × 0.85 = $1,700 Step 2: Add 9% GST on the discounted price. GST = 9% of $1,700 = 0.09 × $1,700 = $153 Final price = $1,700 + $153 = $1,853 Alternatively: Final price = $1,700 × 1.09 = $1,853 Mr Tan pays $1,853 for the laptop.

Correct answer: $1,853

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