Subtract 81/80 from 40/7
1st number: 5 5/7, 2nd number: 1 1/80
40/7 - 81/80 is 2633/560.
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,
40/7 = 40 × 80/7 × 80 = 3200/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
81/80 = 81 × 7/80 × 7 = 567/560 - Subtract the two like fractions:
3200/560 - 567/560 = 3200 - 567/560 = 2633/560 - In mixed form: 4393/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/7-81/80 40/14-81/80 40/21-81/80 40/35-81/80 40/49-81/80