Subtract 18/7 from 54/36
1st number: 1 18/36, 2nd number: 2 4/7
54/36 - 18/7 is -15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 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 7 × 36 = 252,
18/7 = 18 × 36/7 × 36 = 648/252 - Subtract the two like fractions:
378/252 - 648/252 = 378 - 648/252 = -270/252 - After reducing the fraction, the answer is -15/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/36-36/7 54/72-18/7 54/36-18/14 54/36-54/7 54/36-18/21 54/36-90/7 54/36-18/35 54/36-18/49