Subtract 90/80 from 9/7
1st number: 1 2/7, 2nd number: 1 10/80
9/7 - 90/80 is 9/56.
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,
9/7 = 9 × 80/7 × 80 = 720/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
90/80 = 90 × 7/80 × 7 = 630/560 - Subtract the two like fractions:
720/560 - 630/560 = 720 - 630/560 = 90/560 - After reducing the fraction, the answer is 9/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7-90/80 9/14-90/80 27/7-90/80 9/21-90/80 45/7-90/80 9/35-90/80 63/7-90/80 9/49-90/80