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Percentage
Last updated at February 12, 2026 by Teachoo
Class 8 (Ganita Prakash - 1, 2 & Old NCERT)
Chapter 1 Class 8 - Fractions in Disguise (Ganita Prakash II)
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Percentage - Definition
- Figure it out - Page 3, 4
- Uses of Percentages
- Percentage of Some Quantity
- Finding Percentage Quickly
- Fractions, Decimals, and Percentages
- Percentages Greater than 100
- Figure it out - Page 12, 13, 14
- Comparing Proportions using Percentage
- Percentage Increase or Decrease
- Profit and Loss
- Taxes
- Figure it out - Page 19, 20
- Growth and Compounding
- Figure it out - Page 22, 23, 24
- Depreciation
- Tricky Percentages
- Finding Mistakes in Percentages
- Figure it out - Page 28, 29, 30
Transcript
PercentagePERCENTAGE: PARTS PER 100 Percent (%) means "for every 100" 00 So, means 90 for every 100We often hear things like, ‘He topped the class with 95% marks’ ‘The air around us has 21% of oxygen’ or ‘This cloth is made up of 80% of cotton’ But what exactly do we mean by this? Percentage is per-cent where, cent Hence, percentage is per 100 So, percent (%) = 𝟏/𝟏𝟎𝟎 What does 50% mean? 50% means 50 out of 100 i.e. 50% = 50 × 1/100 = 50/100 = 5/10 = 𝟏/𝟐 So, 50% means 𝟏/𝟐 What does 100% mean? 100% means 100 out of 100 100% = 100 × 1/100 = 1 So, 100% means 1 What does 20% mean? 20% means 20 out of 100 20% = 20 × 1/100 = 20/100 = 2/10 = 𝟏/𝟓 So, 20% means 𝟏/𝟓
