Subtract 7/40 from 9/56
9/56 - 7/40 is -1/70.
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,
9/56 = 9 × 5/56 × 5 = 45/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
7/40 = 7 × 7/40 × 7 = 49/280 - Subtract the two like fractions:
45/280 - 49/280 = 45 - 49/280 = -4/280 - After reducing the fraction, the answer is -1/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/56-7/40 9/56-14/40 9/56-7/80 27/56-7/40 9/56-21/40 45/56-7/40 9/56-35/40 63/56-7/40 9/56-49/40