Subtract 20/36 from 15/7
1st number: 2 1/7, 2nd number: 20/36
15/7 - 20/36 is 100/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 7 × 36 = 252,
15/7 = 15 × 36/7 × 36 = 540/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Subtract the two like fractions:
540/252 - 140/252 = 540 - 140/252 = 400/252 - After reducing the fraction, the answer is 100/63
- In mixed form: 137/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7-20/36 15/7-40/36 15/14-20/36 15/7-20/72 45/7-20/36 15/7-60/36 15/21-20/36 75/7-20/36 15/35-20/36 15/49-20/36