Subtract 9/7 from 20/10
1st number: 2 0/10, 2nd number: 1 2/7
20/10 - 9/7 is 5/7.
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,
20/10 = 20 × 7/10 × 7 = 140/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
9/7 = 9 × 10/7 × 10 = 90/70 - Subtract the two like fractions:
140/70 - 90/70 = 140 - 90/70 = 50/70 - After reducing the fraction, the answer is 5/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10-9/7 20/10-18/7 20/10-9/14 60/10-9/7 20/10-27/7 20/30-9/7 20/10-9/21 20/10-45/7 20/50-9/7 20/10-9/35 20/10-63/7 20/70-9/7 20/10-9/49