Subtract 81/80 from 5/70
1st number: 5/70, 2nd number: 1 1/80
5/70 - 81/80 is -527/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
5/70 = 5 × 8/70 × 8 = 40/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
81/80 = 81 × 7/80 × 7 = 567/560 - Subtract the two like fractions:
40/560 - 567/560 = 40 - 567/560 = -527/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/70-81/80 15/70-81/80 25/70-81/80 35/70-81/80