Subtract 21/54 from 90/49
1st number: 1 41/49, 2nd number: 21/54
90/49 - 21/54 is 1277/882.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 54 is 2646
Next, find the equivalent fraction of both fractional numbers with denominator 2646 - For the 1st fraction, since 49 × 54 = 2646,
90/49 = 90 × 54/49 × 54 = 4860/2646 - Likewise, for the 2nd fraction, since 54 × 49 = 2646,
21/54 = 21 × 49/54 × 49 = 1029/2646 - Subtract the two like fractions:
4860/2646 - 1029/2646 = 4860 - 1029/2646 = 3831/2646 - After reducing the fraction, the answer is 1277/882
- In mixed form: 1395/882
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/49-42/54 90/98-21/54 90/49-63/54