Subtract 8/40 from 28/56
28/56 - 8/40 is 3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
28/56 = 28 × 5/56 × 5 = 140/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
8/40 = 8 × 7/40 × 7 = 56/280 - Subtract the two like fractions:
140/280 - 56/280 = 140 - 56/280 = 84/280 - After reducing the fraction, the answer is 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/56-16/40 28/56-8/80 84/56-8/40 28/56-24/40 28/56-56/40