Subtract 15/7 from 20/5
1st number: 4 0/5, 2nd number: 2 1/7
20/5 - 15/7 is 13/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
20/5 = 20 × 7/5 × 7 = 140/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
15/7 = 15 × 5/7 × 5 = 75/35 - Subtract the two like fractions:
140/35 - 75/35 = 140 - 75/35 = 65/35 - After reducing the fraction, the answer is 13/7
- In mixed form: 16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5-15/7 20/5-30/7 20/10-15/7 20/5-15/14 60/5-15/7 20/5-45/7 20/15-15/7 20/5-15/21 20/5-75/7 20/25-15/7 20/5-15/35 20/35-15/7 20/5-15/49