Subtract 18/42 from 54/18
1st number: 3 0/18, 2nd number: 18/42
54/18 - 18/42 is 18/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
54/18 = 54 × 7/18 × 7 = 378/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
18/42 = 18 × 3/42 × 3 = 54/126 - Subtract the two like fractions:
378/126 - 54/126 = 378 - 54/126 = 324/126 - After reducing the fraction, the answer is 18/7
- In mixed form: 24/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18-36/42 54/36-18/42 54/18-18/84 54/18-54/42 54/18-90/42 54/90-18/42