1. Percentage of a quantity With a calculator Example What is 23% of 40 kg

2. Example What is 17% of £6.50? Example I pay 6% of my salary into a pension fund. How much do I pay into my fund if my salary is £12450 per annum?

3. Example Every year a car loses 15% of its value at the beginning of that year. If it was originally worth £5000, what will it be worth after 2 years?

4. Example The population of Umbridge increased by 37% during the years 1960-80. If the population in 1960 was 447, what was the population in 1980?