Subtract 3/21 from 21/6
1st number: 3 3/6, 2nd number: 3/21
21/6 - 3/21 is 47/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42 - Subtract the two like fractions:
147/42 - 6/42 = 147 - 6/42 = 141/42 - After reducing the fraction, the answer is 47/14
- In mixed form: 35/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-3/21 21/6-6/21 21/12-3/21 21/6-3/42 63/6-3/21 21/6-9/21 21/18-3/21 21/6-3/63 21/6-15/21 21/30-3/21 21/42-3/21