Subtract 1/21 from 35/28
1st number: 1 7/28, 2nd number: 1/21
35/28 - 1/21 is 101/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
35/28 = 35 × 3/28 × 3 = 105/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
1/21 = 1 × 4/21 × 4 = 4/84 - Subtract the two like fractions:
105/84 - 4/84 = 105 - 4/84 = 101/84 - In mixed form: 117/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/28-1/21 35/28-2/21 35/56-1/21 35/28-1/42 35/28-3/21 35/84-1/21 35/28-1/63 35/28-5/21 35/28-7/21