Subtract 10/20 from 8/28
8/28 - 10/20 is -3/14.
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,
8/28 = 8 × 5/28 × 5 = 40/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
10/20 = 10 × 7/20 × 7 = 70/140 - Subtract the two like fractions:
40/140 - 70/140 = 40 - 70/140 = -30/140 - After reducing the fraction, the answer is -3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/28-10/20 8/56-10/20 8/28-10/40 24/28-10/20 8/28-30/20 8/84-10/20 8/28-10/60 40/28-10/20 8/28-50/20 56/28-10/20 8/28-70/20