Subtract 21/80 from 6/7
6/7 - 21/80 is 333/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
6/7 = 6 × 80/7 × 80 = 480/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560 - Subtract the two like fractions:
480/560 - 147/560 = 480 - 147/560 = 333/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/7-21/80 6/7-42/80 6/14-21/80 18/7-21/80 6/7-63/80 6/21-21/80 30/7-21/80 6/35-21/80 42/7-21/80 6/49-21/80