Subtract 81/80 from 2/7
1st number: 2/7, 2nd number: 1 1/80
2/7 - 81/80 is -407/560.
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,
2/7 = 2 × 80/7 × 80 = 160/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
81/80 = 81 × 7/80 × 7 = 567/560 - Subtract the two like fractions:
160/560 - 567/560 = 160 - 567/560 = -407/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7-81/80 2/14-81/80 6/7-81/80 2/21-81/80 10/7-81/80 2/35-81/80 14/7-81/80 2/49-81/80