Subtract 7/40 from 30/56
30/56 - 7/40 is 101/280.
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,
30/56 = 30 × 5/56 × 5 = 150/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
7/40 = 7 × 7/40 × 7 = 49/280 - Subtract the two like fractions:
150/280 - 49/280 = 150 - 49/280 = 101/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/56-7/40 30/56-14/40 30/56-7/80 90/56-7/40 30/56-21/40 30/56-35/40 30/56-49/40