Subtract 20/7 from 90/10
1st number: 9 0/10, 2nd number: 2 6/7
90/10 - 20/7 is 43/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
90/10 = 90 × 7/10 × 7 = 630/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
20/7 = 20 × 10/7 × 10 = 200/70 - Subtract the two like fractions:
630/70 - 200/70 = 630 - 200/70 = 430/70 - After reducing the fraction, the answer is 43/7
- In mixed form: 61/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10-40/7 90/20-20/7 90/10-20/14 90/10-60/7 90/30-20/7 90/10-20/21 90/50-20/7 90/10-20/35 90/70-20/7 90/10-20/49