Junior Cycle (Ireland) · Mathematics

Percentages

9 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 9 questions

The price of a camera is first increased by $30%$ and then reduced by $20%$ . What is the overall change in the price?
The price of a camera is first increased by $20%$ and then reduced by $20%$ . What is the overall change in the price?
After an increase of $50%$ , the price of a bag is $\$ 300$. What was the price before the increase?
After an increase of $50%$ , the price of a bag is $\$ 600$. What was the price before the increase?
After an increase of $20%$ , the price of a bag is $\$ 960$. What was the price before the increase?
After an increase of $40%$ , the price of a bag is $\$ 1120$. What was the price before the increase?
A sum of $\$ 8000$ is deposited for 2 years at $10\%$ p.a. compound interest, interest added yearly. Find the interest earned.
A sum of $\$ 40000$ is deposited for 2 years at $2\%$ p.a. compound interest, interest added yearly. Find the interest earned.
A sum of $\$ 20000$ is deposited for 2 years at $4\%$ p.a. compound interest, interest added yearly. Find the interest earned.

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