Subtract 15/18 from 54/7
1st number: 7 5/7, 2nd number: 15/18
54/7 - 15/18 is 289/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
54/7 = 54 × 18/7 × 18 = 972/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126 - Subtract the two like fractions:
972/126 - 105/126 = 972 - 105/126 = 867/126 - After reducing the fraction, the answer is 289/42
- In mixed form: 637/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/7-30/18 54/14-15/18 54/7-15/36 54/7-45/18 54/21-15/18 54/7-15/54 54/7-75/18 54/35-15/18 54/7-15/90 54/49-15/18