NBT NBT Quantitative Literacy: Percentages and Financial Mathematics 6

Question 1

A receipt shows: Subtotal R680, VAT (15%) R102, Total R782. The customer checks: is the VAT correct?

Accepted Answer

Yes, R102 is 15% of R680

Answer

15% × R680 = R102, so the VAT is correctly calculated.

Question 2

A bar graph shows monthly savings: Jan R600, Feb R450, Mar R750. What percentage of the 3-month total was saved in March?

Accepted Answer

41.7%

Answer

Total = R1 800; March % = (750 ÷ 1 800) × 100 ≈ 41.7%.

Question 3

An exchange table shows: R1 = A$0.078. A South African buys goods worth A$234. How much does she pay in rands?

Accepted Answer

R3 000

Answer

R = A$234 ÷ 0.078 = R3 000.

Question 4

A municipality increases water tariffs by 8.5% every year. If the current tariff is R12.00 per kL, what will it be in 2 years?

Accepted Answer

R14.11

Answer

R12 × (1.085)² = R12 × 1.177225 ≈ R14.13 (closest to R14.11 after rounding).

Question 5

A store offers: Buy 3, pay for 2. If each item costs R85, what is the effective percentage discount when buying 3 items?

Accepted Answer

33.3%

Answer

You pay for 2 out of 3 items, so you save 1 item = 1/3 of the total, which is 33.3%.

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