Subtract 1/42 from 54/36
1st number: 1 18/36, 2nd number: 1/42
54/36 - 1/42 is 31/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
54/36 = 54 × 7/36 × 7 = 378/252 - Likewise, for the 2nd fraction, since 42 × 6 = 252,
1/42 = 1 × 6/42 × 6 = 6/252 - Subtract the two like fractions:
378/252 - 6/252 = 378 - 6/252 = 372/252 - After reducing the fraction, the answer is 31/21
- In mixed form: 110/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/36-2/42 54/72-1/42 54/36-1/84 54/36-3/42 54/36-5/42 54/36-7/42