Percent of a Number Worksheet
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Percent of a Number Worksheet
Name:Date:Class:
1.What is 100% of 68?
2.What is 50% of 8?
3.What is 25% of 40?
4.What is 80% of 10?
5.What is 100% of 39?
6.What is 80% of 100?
7.What is 100% of 17?
8.What is 100% of 52?
9.What is 100% of 97?
10.What is 100% of 15?
11.What is 40% of 30?
12.What is 100% of 42?
13.What is 20% of 80?
14.What is 100% of 95?
15.What is 60% of 10?
16.What is 100% of 3?
17.What is 50% of 52?
18.What is 40% of 70?
19.What is 25% of 72?
20.What is 80% of 45?
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Worked Example
Problem: What is 35% of 140?
- Convert the percent to a decimal: 35% ÷ 100 = 0.35— Dividing by 100 moves the decimal point two places to the left, turning a percent into a multiplier.
- Multiply: 0.35 × 140— Multiplying by the decimal form of the percent gives the part directly.
- 0.35 × 140 = 49— You can break it up: 0.3 × 140 = 42 and 0.05 × 140 = 7, then 42 + 7 = 49.
Answer: 35% of 140 = 49
Frequently Asked Questions
Convert the percent to a decimal by dividing by 100, then multiply. For example, 35% of 80: 0.35 × 80 = 28.
Yes. Convert the percent to a fraction (e.g., 25% = 1/4), then multiply. This is often faster for "friendly" percentages like 25%, 50%, and 75%.
Move the decimal point one place to the left. 10% of 350 is 35. You can build other percentages from this: 5% is half of 10%, 20% is double 10%, etc.
Set up the proportion: (part)/(whole) = (percent)/100. Fill in what you know and solve for the missing value. This method works for all three types of percent problems.
"Percent of a number" finds a part of a whole (e.g., 20% of 60 = 12). "Percent change" measures how much a value increased or decreased relative to the original.