Subtract 25/21 from 28/25
1st number: 1 3/25, 2nd number: 1 4/21
28/25 - 25/21 is -37/525.
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,
28/25 = 28 × 21/25 × 21 = 588/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
25/21 = 25 × 25/21 × 25 = 625/525 - Subtract the two like fractions:
588/525 - 625/525 = 588 - 625/525 = -37/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/25-25/21 28/25-50/21 28/50-25/21 28/25-25/42 84/25-25/21 28/25-75/21 28/75-25/21 28/25-25/63