Subtract 10/90 from 12/7
1st number: 1 5/7, 2nd number: 10/90
12/7 - 10/90 is 101/63.
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,
12/7 = 12 × 90/7 × 90 = 1080/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
10/90 = 10 × 7/90 × 7 = 70/630 - Subtract the two like fractions:
1080/630 - 70/630 = 1080 - 70/630 = 1010/630 - After reducing the fraction, the answer is 101/63
- In mixed form: 138/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7-10/90 12/7-20/90 12/14-10/90 36/7-10/90 12/7-30/90 12/21-10/90 60/7-10/90 12/7-50/90 12/35-10/90 84/7-10/90 12/7-70/90 12/49-10/90