These questions are somewhat harder, but give them your best shot!
- Ian earns £420 a week after a 5% rise. What was his pay before?
- An Iyonix PC is sold for £1200 at a reduction of 20% on its recommended retail price. What was the computer's original price?
- Kenny has £3200 in a savings account. After a year, the bank pays him interest increasing his balance to £3360. What percentage rate was applied to the account?
- On my sister's 15th birthday, she was 159 cm in height, having grown 6% since the year before. How tall was she the previous year?