Starter Questions 22 02 11 1 Write the following as

Starter Questions 22/02/11 1. Write the following as a fraction & a decimal : a. 32% b. 63% c. 81% 2. Calculate the following : a. 4% of £ 12 b. 18% of £ 8. 50 c. 45% of £ 80

22/02/11 Calculating Percentages Learning Intention To be able to calculate % increase and decrease. To be able to calculate appreciation and depreciation.

22/02/11 Calculating Percentages % Increase/Decrease Example The cost of a yearly train ticket has increased by 5%. What is the new price if it currently costs £ 240 ? Increase = 5% of £ 240 = 5 ÷ 100 x £ 240 = £ 12 New cost = £ 240 + £ 12 = £ 252

22/02/11 Calculating Percentages Appreciation & Depreciation Appreciation / Depreciation Appreciation : Going up in value e. g. House value Depreciation : Going down in value e. g. car value

22/02/11 Calculating Percentages Appreciation & Depreciation Average house price in Dunfermline has appreciated by 50% over the past 10 years. If you bought the house for £ 80 000 in 2001 how much would the house be worth now ? Appreciation = 50% x £ 80 000 = 0. 50 x £ 80 000 = £ 40 000 New value = Old Value + Appreciation = £ 80 000 + £ 40 000 = £ 120 000

22/02/11 Calculating Percentages Appreciation & Depreciation A second hand car depreciated by 10% in the 1 st year and by 20 % in the 2 nd Year after buying it. If its initial value was £ 1 000, what is its value now ? 1 st Year Depreciation = 10% x £ 1 000 = 0. 1 x £ 1 000 = £ 100 New Value = £ 1 000 - £ 100 = £ 900 2 nd Year Depreciation = 20% x £ 900 = 0. 2 x £ 900 = £ 180 New Value = £ 900 - £ 180 = £ 720

22/02/11 Calculating Percentages Learning Intention To be able to calculate % increase and decrease. To be able to calculate appreciation and depreciation.