Subtract 36/21 from 54/12
1st number: 4 6/12, 2nd number: 1 15/21
54/12 - 36/21 is 39/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
54/12 = 54 × 7/12 × 7 = 378/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
36/21 = 36 × 4/21 × 4 = 144/84 - Subtract the two like fractions:
378/84 - 144/84 = 378 - 144/84 = 234/84 - After reducing the fraction, the answer is 39/14
- In mixed form: 211/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/12-72/21 54/24-36/21 54/12-36/42 54/36-36/21 54/12-36/63 54/60-36/21 54/84-36/21