Subtract 2/90 from 8/7
1st number: 1 1/7, 2nd number: 2/90
8/7 - 2/90 is 353/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
8/7 = 8 × 90/7 × 90 = 720/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
2/90 = 2 × 7/90 × 7 = 14/630 - Subtract the two like fractions:
720/630 - 14/630 = 720 - 14/630 = 706/630 - After reducing the fraction, the answer is 353/315
- In mixed form: 138/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/7-2/90 8/7-4/90 8/14-2/90 24/7-2/90 8/7-6/90 8/21-2/90 40/7-2/90 8/7-10/90 8/35-2/90 56/7-2/90 8/7-14/90 8/49-2/90