How to Find Fractions Equivalent to 6/21
1. Choose a multiplier
Use the same non-zero number for both terms; start with 2.
2. Multiply both terms
6 × 2 = 12 and 21 × 2 = 42.
3. Verify the ratio
6 × 42 and 21 × 12 both equal 252.
Direct answer
12/42, 18/63, and 24/84 are equivalent to 6/21.
Enter whole-number numerator and denominator values. Results update instantly.
2/7
0.285714…
28.571429%
12/42 · 18/63 · 24/84
Use the same non-zero number for both terms; start with 2.
6 × 2 = 12 and 21 × 2 = 42.
6 × 42 and 21 × 12 both equal 252.
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 | (6 × 2) / (21 × 2) | 12/42 | 6 × 42 = 21 × 12 |
| × 3 | (6 × 3) / (21 × 3) | 18/63 | 6 × 63 = 21 × 18 |
| × 4 | (6 × 4) / (21 × 4) | 24/84 | 6 × 84 = 21 × 24 |
| × 5 | (6 × 5) / (21 × 5) | 30/105 | 6 × 105 = 21 × 30 |
| × 6 | (6 × 6) / (21 × 6) | 36/126 | 6 × 126 = 21 × 36 |
| × 7 | (6 × 7) / (21 × 7) | 42/147 | 6 × 147 = 21 × 42 |
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.
12/42 is one equivalent fraction because both terms were multiplied by 2.
No. Divide the terms by 3 to get 2/7.
Cross-multiply. If the two cross-products are equal, the fractions represent the same value.
6/21 equals 0.285714… as a decimal and 28.571429% as a percentage.