Subtract 21/25 from 3/28
3/28 - 21/25 is -513/700.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 25 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 28 × 25 = 700,
3/28 = 3 × 25/28 × 25 = 75/700 - Likewise, for the 2nd fraction, since 25 × 28 = 700,
21/25 = 21 × 28/25 × 28 = 588/700 - Subtract the two like fractions:
75/700 - 588/700 = 75 - 588/700 = -513/700
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28-21/25 3/28-42/25 3/56-21/25 3/28-21/50 9/28-21/25 3/28-63/25 3/84-21/25 3/28-21/75 15/28-21/25 21/28-21/25