Subtract 18/56 from 28/40
28/40 - 18/56 is 53/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
28/40 = 28 × 7/40 × 7 = 196/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
18/56 = 18 × 5/56 × 5 = 90/280 - Subtract the two like fractions:
196/280 - 90/280 = 196 - 90/280 = 106/280 - After reducing the fraction, the answer is 53/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40-18/56 28/40-36/56 28/80-18/56 84/40-18/56 28/40-54/56 28/40-90/56