Subtract 28/21 from 4/25
1st number: 4/25, 2nd number: 1 7/21
4/25 - 28/21 is -88/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
4/25 = 4 × 21/25 × 21 = 84/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
28/21 = 28 × 25/21 × 25 = 700/525 - Subtract the two like fractions:
84/525 - 700/525 = 84 - 700/525 = -616/525 - After reducing the fraction, the answer is -88/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/25-28/21 4/25-56/21 4/50-28/21 4/25-28/42 12/25-28/21 4/25-84/21 4/75-28/21 4/25-28/63 20/25-28/21 28/25-28/21