Subtract 45/20 from 50/7
1st number: 7 1/7, 2nd number: 2 5/20
50/7 - 45/20 is 137/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
50/7 = 50 × 20/7 × 20 = 1000/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Subtract the two like fractions:
1000/140 - 315/140 = 1000 - 315/140 = 685/140 - After reducing the fraction, the answer is 137/28
- In mixed form: 425/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/7-90/20 50/14-45/20 50/7-45/40 50/21-45/20 50/7-45/60 50/35-45/20 50/49-45/20