Decimals and percentages · Usually met around P6
Percentages
From “What a percentage is” to “Simple interest”, step by step, each skill with its methods, worked examples and answers.
Skills in this topic, easy to hard
- What a percentage isA percentage is how many out of 100
- Percentages, fractions and decimalsA percentage is a fraction out of 100
- Ordering fractions, decimals and percentagesMake them all percentages (or decimals), then compare
- Percentages of an amountFind 10% first, then double or halve
- Percentage increase and decreaseWork on the original: up p% means × (100 + p)%
- Discounts20% off = pay 80% of the price
- Using percentages togetherWhole × the %. Up 10% means × 110%
- Sales taxTax = price × rate; with tax = price × (100% + rate)
- Simple interestInterest = money × yearly rate × years
Practise it in the game →Percentages · Free to start, unlimited questions, no downloadAll maths topics →