Subtract 28/20 from 40/56
1st number: 40/56, 2nd number: 1 8/20
40/56 - 28/20 is -24/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
40/56 = 40 × 5/56 × 5 = 200/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
28/20 = 28 × 14/20 × 14 = 392/280 - Subtract the two like fractions:
200/280 - 392/280 = 200 - 392/280 = -192/280 - After reducing the fraction, the answer is -24/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/56-28/20 40/56-56/20 40/56-28/40 40/56-84/20 40/56-28/60