Practice and Revision - Percentage
Let us practise and revise what we learned about percentage. A percentage represents a number as a fraction of 100, widely used for comparin
Core concept
'Percent' means 'per hundred,' so 25% means 25 out of every 100, or the fraction 25/100.
How it works
To convert a fraction to a percentage, we multiply by 100, like 1/4 becoming 25% (1/4×100=25).
Why it matters
To find a percentage of a number, we multiply the number by the percentage as a decimal, like 20% of 50 being 0.20×50=10.
Key detail
Percentages are widely used for discounts in shopping, exam marks, statistics, and comparing proportions easily.
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Quick notes
• Percent means 'per hundred'.
• 25% = 25/100.
• Fraction to percentage: multiply by 100.
• 1/4×100=25%.
• Percentage of a number: multiply by decimal form.
• 20% of 50 = 0.20×50=10.
• Used in discounts, marks, statistics.
• It helps compare proportions easily.