New Topic: Percentage Calculations

By the end of this topic you will be able to:

Calculate percentages using decimal values (e.g. 70% = 0.7)

Calculate percentage increase/decrease

Apply a percentage increase/decrease repeatedly

Understand the terms profit/loss, appreciation/depreciation

Know the difference between simple interest and compound interest

Apply knowledge to solve problems in context

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Filed under: 4th Year | Tagged: interest, money, National 5, percentages |

Mr H, on Monday 13 September, 2010 at 11:30 said:Tuesday 7 September, period 3Starter: p24 Q3,4 & 7

Revision of percentage calculations.

Simple interest then compound interest (by calculating each year individually)

Introduce quick method, e.g. 0.7 x £40

Then Ex10.1

Mr H, on Monday 13 September, 2010 at 11:34 said:Wednesday 8 September, period 1Compound Interest Ex10.2

Work out successive years individually then find out how to apply compound interest in one calculation.

Homework due:Areas & VolumesMr H, on Monday 13 September, 2010 at 11:35 said:Thursday 9 September, period 1Appreciation & Depreciation

Worked examples with real house price for appreciation and real used car values for depreciation.

Ex11.1