Subtract 12/80 from 8/7
1st number: 1 1/7, 2nd number: 12/80
8/7 - 12/80 is 139/140.
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,
8/7 = 8 × 80/7 × 80 = 640/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
12/80 = 12 × 7/80 × 7 = 84/560 - Subtract the two like fractions:
640/560 - 84/560 = 640 - 84/560 = 556/560 - After reducing the fraction, the answer is 139/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/7-12/80 8/7-24/80 8/14-12/80 24/7-12/80 8/7-36/80 8/21-12/80 40/7-12/80 8/7-60/80 8/35-12/80 56/7-12/80 8/7-84/80 8/49-12/80