Subtract 18/20 from 10/7
1st number: 1 3/7, 2nd number: 18/20
10/7 - 18/20 is 37/70.
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,
10/7 = 10 × 20/7 × 20 = 200/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Subtract the two like fractions:
200/140 - 126/140 = 200 - 126/140 = 74/140 - After reducing the fraction, the answer is 37/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/7-18/20 10/7-36/20 10/14-18/20 10/7-18/40 30/7-18/20 10/7-54/20 10/21-18/20 10/7-18/60 50/7-18/20 10/7-90/20 10/35-18/20 70/7-18/20 10/49-18/20