Subtract 6/56 from 21/80
21/80 - 6/56 is 87/560.
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,
21/80 = 21 × 7/80 × 7 = 147/560 - Likewise, for the 2nd fraction, since 56 × 10 = 560,
6/56 = 6 × 10/56 × 10 = 60/560 - Subtract the two like fractions:
147/560 - 60/560 = 147 - 60/560 = 87/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80-6/56 21/80-12/56 63/80-6/56 21/80-18/56 21/80-30/56 21/80-42/56