Subtract 80/7 from 8/90
1st number: 8/90, 2nd number: 11 3/7
8/90 - 80/7 is -3572/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
8/90 = 8 × 7/90 × 7 = 56/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
80/7 = 80 × 90/7 × 90 = 7200/630 - Subtract the two like fractions:
56/630 - 7200/630 = 56 - 7200/630 = -7144/630 - After reducing the fraction, the answer is -3572/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/90-80/7 8/90-80/14 24/90-80/7 8/90-80/21 40/90-80/7 8/90-80/35 56/90-80/7 8/90-80/49