Subtract 36/20 from 20/28
1st number: 20/28, 2nd number: 1 16/20
20/28 - 36/20 is -38/35.
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,
20/28 = 20 × 5/28 × 5 = 100/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
36/20 = 36 × 7/20 × 7 = 252/140 - Subtract the two like fractions:
100/140 - 252/140 = 100 - 252/140 = -152/140 - After reducing the fraction, the answer is -38/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28-36/20 20/28-72/20 20/56-36/20 20/28-36/40 60/28-36/20 20/84-36/20 20/28-36/60