Subtract 5/9 from 54/21
1st number: 2 12/21, 2nd number: 5/9
54/21 - 5/9 is 127/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
54/21 = 54 × 3/21 × 3 = 162/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
5/9 = 5 × 7/9 × 7 = 35/63 - Subtract the two like fractions:
162/63 - 35/63 = 162 - 35/63 = 127/63 - In mixed form: 21/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21-10/9 54/42-5/9 54/21-5/18 54/21-15/9 54/63-5/9 54/21-5/27 54/21-25/9 54/21-5/45 54/21-35/9 54/21-5/63