Subtract 18/56 from 7/80
7/80 - 18/56 is -131/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 56 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
7/80 = 7 × 7/80 × 7 = 49/560 - Likewise, for the 2nd fraction, since 56 × 10 = 560,
18/56 = 18 × 10/56 × 10 = 180/560 - Subtract the two like fractions:
49/560 - 180/560 = 49 - 180/560 = -131/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/80-18/56 7/80-36/56 21/80-18/56 7/80-54/56 35/80-18/56 7/80-90/56 49/80-18/56