How to Convert 18/20
1. Divide the numerator by the denominator
18 ÷ 20 = 0.9.
2. Multiply the decimal by 100
0.9 × 100 gives 90%.
3. Add the percent sign
The final percent form of 18/20 is 90%.
18/20 as a Percent and Decimal
Direct answer
18/20 is 0.9 as a decimal and 90% as a percentage.
Fraction Converter
Enter whole-number numerator and denominator values. Results update instantly.
Simplified
9/10
Decimal
0.9
Percent
90%
Equivalent fractions
36/40 · 54/60 · 72/80
Equivalent Fraction Table for 18/20
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 | (18 × 2) / (20 × 2) | 36/40 | 18 × 40 = 20 × 36 |
| × 3 | (18 × 3) / (20 × 3) | 54/60 | 18 × 60 = 20 × 54 |
| × 4 | (18 × 4) / (20 × 4) | 72/80 | 18 × 80 = 20 × 72 |
| × 5 | (18 × 5) / (20 × 5) | 90/100 | 18 × 100 = 20 × 90 |
| × 6 | (18 × 6) / (20 × 6) | 108/120 | 18 × 120 = 20 × 108 |
| × 7 | (18 × 7) / (20 × 7) | 126/140 | 18 × 140 = 20 × 126 |
Where 18/20 Appears
Because the numerator and denominator share a factor, this example is especially useful for practicing reduction before conversion.
Learning tip: Simplify first to make the decimal division and equivalence check easier.
Compare Every Form
- Fraction18/20
- Simplified fraction9/10
- Decimal0.9
- Percent90%
Related Fraction Guides
Frequently Asked Questions
What is 18/20 as a decimal?
Divide 18 by 20. The decimal form is 0.9.
What is 18/20 as a percent?
Multiply its decimal value by 100. The result is 90%.
Does the decimal for 18/20 terminate?
Yes. Its simplified denominator has no prime factors other than 2 or 5.
What is 18/20 in simplest form?
18/20 simplifies to 9/10. This does not change its decimal or percentage value.