Subtract 49/20 from 28/70
1st number: 28/70, 2nd number: 2 9/20
28/70 - 49/20 is -41/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
28/70 = 28 × 2/70 × 2 = 56/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
49/20 = 49 × 7/20 × 7 = 343/140 - Subtract the two like fractions:
56/140 - 343/140 = 56 - 343/140 = -287/140 - After reducing the fraction, the answer is -41/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70-49/20 28/70-98/20 28/70-49/40 84/70-49/20 28/70-49/60