Percentages

1.John has just put £700 into a savings account where the rate of interest is 4% per annum. How much will his savings be worth after 3 years?

2. Mary puts £1200 into an account where the annual rate of interest is 5∙5%. How long will it be before she has at least £1400 in her account?

3. My new car has just cost me £18,000. Its value will depreciate by 20% every year. How much will it be worth when I trade it in 3 years from now?

4. The pressure in my car tyre should be 30psi, but a nail in it is causing it to lose pressure at the rate of 15% every mile that I drive. How far can I drive before the pressure falls below 20psi?

5. Hassan has been told his hourly pay is to increase by 6% to £9.54. Calculate his hourly rate before the increase.

6. Due to fire damage, the value of a painting has fallen by 34% and is now valued at £4158. What was its value before the damage?

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