Subtract 45/20 from 35/28
1st number: 1 7/28, 2nd number: 2 5/20
35/28 - 45/20 is -1/1.
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,
35/28 = 35 × 5/28 × 5 = 175/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Subtract the two like fractions:
175/140 - 315/140 = 175 - 315/140 = -140/140 - After reducing the fraction, the answer is -1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/28-45/20 35/28-90/20 35/56-45/20 35/28-45/40 35/84-45/20 35/28-45/60