Subtract 81/40 from 4/28
1st number: 4/28, 2nd number: 2 1/40
4/28 - 81/40 is -527/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
4/28 = 4 × 10/28 × 10 = 40/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
81/40 = 81 × 7/40 × 7 = 567/280 - Subtract the two like fractions:
40/280 - 567/280 = 40 - 567/280 = -527/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/28-81/40 4/56-81/40 4/28-81/80 12/28-81/40 4/84-81/40 20/28-81/40