Subtract 81/5 from 10/28
1st number: 10/28, 2nd number: 16 1/5
10/28 - 81/5 is -1109/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 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 5 × 28 = 140,
81/5 = 81 × 28/5 × 28 = 2268/140 - Subtract the two like fractions:
50/140 - 2268/140 = 50 - 2268/140 = -2218/140 - After reducing the fraction, the answer is -1109/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/28-81/5 10/56-81/5 10/28-81/10 30/28-81/5 10/84-81/5 10/28-81/15 50/28-81/5 10/28-81/25 70/28-81/5 10/28-81/35