Subtract 2/28 from 70/21
1st number: 3 7/21, 2nd number: 2/28
70/21 - 2/28 is 137/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
70/21 = 70 × 4/21 × 4 = 280/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
2/28 = 2 × 3/28 × 3 = 6/84 - Subtract the two like fractions:
280/84 - 6/84 = 280 - 6/84 = 274/84 - After reducing the fraction, the answer is 137/42
- In mixed form: 311/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-4/28 70/42-2/28 70/21-2/56 70/21-6/28 70/63-2/28 70/21-2/84 70/21-10/28 70/21-14/28