📚 Finding X% of a Number
To find a percentage of a number, convert the percentage to a decimal and multiply.
X% of Y = (X ÷ 100) × Y
Example: What is 20% of 150?
1
Convert 20% to decimal: 20 ÷ 100 = 0.20
2
Multiply: 0.20 × 150 = 30
Quick Mental Math Trick:
To find 10% of any number, just move the decimal point one place left.
10% of 250 = 25
Then for 20%, just double it: 20% of 250 = 50
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What is 25% of 200?
25% = 0.25, so multiply 0.25 × 200
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What is 15% of 80?
10% of 80 = 8, 5% = 4, so 15% = 8 + 4
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