Subtract 24/21 from 21/6
1st number: 3 3/6, 2nd number: 1 3/21
21/6 - 24/21 is 33/14.
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,
24/21 = 24 × 2/21 × 2 = 48/42 - Subtract the two like fractions:
147/42 - 48/42 = 147 - 48/42 = 99/42 - After reducing the fraction, the answer is 33/14
- In mixed form: 25/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-24/21 21/6-48/21 21/12-24/21 21/6-24/42 63/6-24/21 21/6-72/21 21/18-24/21 21/6-24/63 21/30-24/21 21/42-24/21