Subtract 7/12 from 54/21
1st number: 2 12/21, 2nd number: 7/12
54/21 - 7/12 is 167/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
54/21 = 54 × 4/21 × 4 = 216/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
7/12 = 7 × 7/12 × 7 = 49/84 - Subtract the two like fractions:
216/84 - 49/84 = 216 - 49/84 = 167/84 - In mixed form: 183/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21-14/12 54/42-7/12 54/21-7/24 54/21-21/12 54/63-7/12 54/21-7/36 54/21-35/12 54/21-7/60 54/21-49/12 54/21-7/84