Subtract 80/20 from 10/28
1st number: 10/28, 2nd number: 4 0/20
10/28 - 80/20 is -51/14.
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,
10/28 = 10 × 5/28 × 5 = 50/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
80/20 = 80 × 7/20 × 7 = 560/140 - Subtract the two like fractions:
50/140 - 560/140 = 50 - 560/140 = -510/140 - After reducing the fraction, the answer is -51/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/28-80/20 10/56-80/20 10/28-80/40 30/28-80/20 10/84-80/20 10/28-80/60 50/28-80/20 70/28-80/20