Percent
ICSE · Class 6 · Mathematics
Summary of Percent for ICSE Class 6 Mathematics. Key concepts, important points, and chapter overview.
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Overview
The chapter 'Percent' introduces students to one of the most useful mathematical concepts used in daily life — percentage. Percent means 'per hundred' and is represented by the symbol '%'. It helps us compare quantities easily by expressing them as parts of 100. Whether it's exam scores, discounts i
Key Concepts
Percent means 'out of 100'
Percent means 'out of 100'. For example, 30% means 30 out of 100. It is written as 30/100 or 0.30. The symbol '%' is used to denote percent.
To convert a fraction or decimal
To convert a fraction or decimal to percent, multiply it by 100 and add the % symbol. For example, 0.25 = 0.25 × 100% = 25%.
To convert a percent to
To convert a percent to a fraction, divide by 100 and simplify. For example, 40% = 40/100 = 2/5. To convert to decimal, divide by 100: 40% = 0.40.
To find a certain percent
To find a certain percent of a number, convert the percent to a fraction and multiply. For example, 20% of 150 = (20/100) × 150 = 30.
Divide the first quantity by
Divide the first quantity by the second and multiply by 100%. For example, 20 as a percent of 80 = (20/80) × 100% = 25%.
Learning Objectives
- Understand the meaning and use of percent
- Convert fractions and decimals into percentages and vice versa
- Express one quantity as a percentage of another
- Find the percentage of a given quantity
- Calculate increase or decrease in percentage
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