Subtract 9/20 from 54/7
1st number: 7 5/7, 2nd number: 9/20
54/7 - 9/20 is 1017/140.
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,
54/7 = 54 × 20/7 × 20 = 1080/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
9/20 = 9 × 7/20 × 7 = 63/140 - Subtract the two like fractions:
1080/140 - 63/140 = 1080 - 63/140 = 1017/140 - In mixed form: 737/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/7-18/20 54/14-9/20 54/7-9/40 54/7-27/20 54/21-9/20 54/7-9/60 54/7-45/20 54/35-9/20 54/7-63/20 54/49-9/20