4/5 as a Percent

How to convert 4/5 to a percent

1. Divide the top number by the bottom number: 4 ÷ 5 = 0.8.
2. Multiply by 100: 0.8 × 100 = 80%.

Shortcut: 5 goes into 100 exactly 20 times, so multiply the top and bottom by 20. 4/5 = 80/100 = 80%.

Where you will see 4/5

Four out of five dentists is the classic advertising line, and it means 80% of those asked.

On a five-star rating, 4 stars is 4/5 of the maximum, or 80%. A 4.5 rating is 90%.

How 4/5 compares with nearby fractions

4/5 (80%) is a little more than 3/4 (75%) and a little less than 5/6 (83.33%). This is handy for estimating: if you remember the nearby benchmark, you can check that your answer is in the right range before you rely on it.

Check it in reverse

To go from the percent back to the fraction, write 80% over 100 and simplify. 80% = 80/100, which reduces back to 4/5.

4/5 of common amounts

Knowing that 4/5 is 80% lets you take that share of any number:

• 4/5 of 20 = 16
• 4/5 of 50 = 40
• 4/5 of 80 = 64
• 4/5 of 200 = 160

All the 5ths as percents

Other fractions as percents

• 6/7
• 1/8
• 1/6
• 3/5
• 3/2
• 5/8
• 5/4
• 5 1/5
• 2/5
• 1/5
• 1/3
• 4 3/4
• 4 1/4
• 3/8
• 1/4
• 5/7