Subtract 25/28 from 21/10
1st number: 2 1/10, 2nd number: 25/28
21/10 - 25/28 is 169/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 10 × 14 = 140,
21/10 = 21 × 14/10 × 14 = 294/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
25/28 = 25 × 5/28 × 5 = 125/140 - Subtract the two like fractions:
294/140 - 125/140 = 294 - 125/140 = 169/140 - In mixed form: 129/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-25/28 21/10-50/28 21/20-25/28 21/10-25/56 63/10-25/28 21/10-75/28 21/30-25/28 21/10-25/84 21/50-25/28 21/70-25/28