← Aptitude for placements
Lesson 1 of 5
Percentages
Watch, read the card, then practise. Percent of a number · Percent increase and decrease
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Meanwhile, the notes below and the 60-second cards cover the same ideas.
Practise this topicPercent of a number
Percent means 'out of 100'. To find x% of a number, multiply by x and divide by 100.
Remember: Part ÷ whole × 100 gives the percent.
Percent increase and decrease
Percent change compares the change with the starting value.
Remember: Always divide by the old (starting) value.