Subtract 28/40 from 7/25
7/25 - 28/40 is -21/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 40 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 25 × 8 = 200,
7/25 = 7 × 8/25 × 8 = 56/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
28/40 = 28 × 5/40 × 5 = 140/200 - Subtract the two like fractions:
56/200 - 140/200 = 56 - 140/200 = -84/200 - After reducing the fraction, the answer is -21/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/25-28/40 7/25-56/40 7/50-28/40 7/25-28/80 21/25-28/40 7/25-84/40 7/75-28/40 35/25-28/40 49/25-28/40