Subtract 27/12 from 54/21
1st number: 2 12/21, 2nd number: 2 3/12
54/21 - 27/12 is 9/28.
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,
27/12 = 27 × 7/12 × 7 = 189/84 - Subtract the two like fractions:
216/84 - 189/84 = 216 - 189/84 = 27/84 - After reducing the fraction, the answer is 9/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21-54/12 54/42-27/12 54/21-27/24 54/21-81/12 54/63-27/12 54/21-27/36 54/21-27/60 54/21-27/84