Simple and compound interest

12 questions

1. If a number increases by 0.2% and is now 1252.5, what was it originally?
2. If a number decreases by 64% and is now 54, what was it originally?
3. Write 90 as a percentage of 1800
4. Find 60% of 70
5. Which statement is the equivalent of "Decrease 90 by 20%"?
6. If a number decreases by 40% and is now 54, what was it originally?
7. If you invest £300 for three years and receive 2% simple interest each year, how much will you have at the end?
8. If you invest £500 for three years and receive 3% simple interest each year, how much will you have at the end?
9. If you invest £1200 for five years and receive 2.5% simple interest each year, how much will you have at the end?
10. If you invest £300 for three years and receive 2% compound interest each year, how much will you have at the end (to 2 d.p.)?
11. If you invest £500 for three years and receive 2.5% compound interest each year, how much will you have at the end (to 2 d.p.)?
12. If I started with £58 and have £61.48 after 3 years in savings with an interest rate of 2%, was the interest simple or compound?

License: OGL