How to Convert 21/20
1. Divide the numerator by the denominator
21 ÷ 20 = 1.05.
2. Multiply the decimal by 100
1.05 × 100 gives 105%.
3. Add the percent sign
The final percent form of 21/20 is 105%.
21/20 as a Percent and Decimal
Direct answer
21/20 is 1.05 as a decimal and 105% as a percentage.
Fraction Converter
Enter whole-number numerator and denominator values. Results update instantly.
Simplified
21/20
Decimal
1.05
Percent
105%
Equivalent fractions
42/40 · 63/60 · 84/80
Equivalent Fraction Table for 21/20
Multiply the numerator and denominator by the same non-zero whole number. The written numbers change, but the ratio stays equal.
| Multiplier | Calculation | Equivalent fraction | Cross-product check |
|---|---|---|---|
| × 2 | (21 × 2) / (20 × 2) | 42/40 | 21 × 40 = 20 × 42 |
| × 3 | (21 × 3) / (20 × 3) | 63/60 | 21 × 60 = 20 × 63 |
| × 4 | (21 × 4) / (20 × 4) | 84/80 | 21 × 80 = 20 × 84 |
| × 5 | (21 × 5) / (20 × 5) | 105/100 | 21 × 100 = 20 × 105 |
| × 6 | (21 × 6) / (20 × 6) | 126/120 | 21 × 120 = 20 × 126 |
| × 7 | (21 × 7) / (20 × 7) | 147/140 | 21 × 140 = 20 × 147 |
Where 21/20 Appears
This value is greater than one whole, so it is useful for rates, recipe scaling, and measurements that exceed one unit.
Learning tip: Convert an improper fraction to a mixed number when a real-world measurement is easier to read that way.
Compare Every Form
- Fraction21/20
- Simplified fraction21/20
- Decimal1.05
- Percent105%
Related Fraction Guides
Frequently Asked Questions
What is 21/20 as a decimal?
Divide 21 by 20. The decimal form is 1.05.
What is 21/20 as a percent?
Multiply its decimal value by 100. The result is 105%.
Does the decimal for 21/20 terminate?
Yes. Its simplified denominator has no prime factors other than 2 or 5.
What is 21/20 in simplest form?
21/20 simplifies to 21/20. This does not change its decimal or percentage value.