Subtract 50/20 from 3/7
1st number: 3/7, 2nd number: 2 10/20
3/7 - 50/20 is -29/14.
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,
3/7 = 3 × 20/7 × 20 = 60/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
50/20 = 50 × 7/20 × 7 = 350/140 - Subtract the two like fractions:
60/140 - 350/140 = 60 - 350/140 = -290/140 - After reducing the fraction, the answer is -29/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-50/20 3/14-50/20 3/7-50/40 9/7-50/20 3/21-50/20 3/7-50/60 15/7-50/20 3/35-50/20 21/7-50/20 3/49-50/20