How to Convert a Fraction to a Percent

Method 1: The Decimal Method

Step 1: Divide the numerator by the denominator to get a decimal.
Step 2: Multiply the decimal by 100 and add the % sign.

Convert 3/8 to a percent

Divide: 3 ÷ 8 = 0.375

Multiply: 0.375 × 100 = 37.5%

Method 2: Scale to 100

If the denominator divides evenly into 100, multiply both top and bottom to make the denominator 100. The numerator is your percent.

Convert 3/5 to a percent

5 × 20 = 100, so multiply both by 20

3 × 20 = 60, 5 × 20 = 100

60/100 = 60%

This method is fastest when the denominator is 2, 4, 5, 10, 20, 25, or 50 — they all divide cleanly into 100.

Common Fractions to Know

Fraction	Percent
1/2	50%
1/3	33.3%
1/4	25%
1/5	20%
3/4	75%
2/3	66.7%

💡 Which method? Use Method 2 when the denominator divides into 100 easily. Use Method 1 for everything else.

🎯 Practice Problems

1. Convert 1/4 to a percent.

A) 4%

B) 14%

C) 25%

D) 40%

2. Convert 3/5 to a percent.

A) 35%

B) 53%

C) 60%

D) 30%

3. Convert 7/10 to a percent.

A) 7%

B) 710%

C) 70%

D) 17%

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🎯 Bonus Practice

1. Convert 1/3 to a percent (round to one decimal).

A) 3.3%

B) 33.3%

C) 30%

D) 13%

2. Convert 4/5 to a percent.

A) 45%

B) 54%

C) 40%

D) 80%

3. Convert 5/4 to a percent.

A) 54%

B) 125%

C) 45%

D) 75%

4. Convert 1/8 to a percent.

A) 8%

B) 18%

C) 12.5%

D) 80%

5. Convert 9/20 to a percent.

A) 920%

B) 45%

C) 9.2%

D) 4.5%