Subtract 21/14 from 70/21
1st number: 3 7/21, 2nd number: 1 7/14
70/21 - 21/14 is 11/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
70/21 = 70 × 2/21 × 2 = 140/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
21/14 = 21 × 3/14 × 3 = 63/42 - Subtract the two like fractions:
140/42 - 63/42 = 140 - 63/42 = 77/42 - After reducing the fraction, the answer is 11/6
- In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-42/14 70/42-21/14 70/21-21/28 70/21-63/14 70/63-21/14 70/21-21/42 70/21-21/70 70/21-21/98