Subtract 7/80 from 20/7
1st number: 2 6/7, 2nd number: 7/80
20/7 - 7/80 is 1551/560.
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,
20/7 = 20 × 80/7 × 80 = 1600/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
7/80 = 7 × 7/80 × 7 = 49/560 - Subtract the two like fractions:
1600/560 - 49/560 = 1600 - 49/560 = 1551/560 - In mixed form: 2431/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7-7/80 20/7-14/80 20/14-7/80 60/7-7/80 20/7-21/80 20/21-7/80 20/7-35/80 20/35-7/80 20/7-49/80 20/49-7/80