Subtract 49/20 from 25/28
1st number: 25/28, 2nd number: 2 9/20
25/28 - 49/20 is -109/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
25/28 = 25 × 5/28 × 5 = 125/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
49/20 = 49 × 7/20 × 7 = 343/140 - Subtract the two like fractions:
125/140 - 343/140 = 125 - 343/140 = -218/140 - After reducing the fraction, the answer is -109/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/28-49/20 25/28-98/20 25/56-49/20 25/28-49/40 75/28-49/20 25/84-49/20 25/28-49/60