Add 21/54 and 15/49
21/54 + 15/49 is 613/882.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 49 is 2646
Next, find the equivalent fraction of both fractional numbers with denominator 2646 - For the 1st fraction, since 54 × 49 = 2646,
21/54 = 21 × 49/54 × 49 = 1029/2646 - Likewise, for the 2nd fraction, since 49 × 54 = 2646,
15/49 = 15 × 54/49 × 54 = 810/2646 - Add the two like fractions:
1029/2646 + 810/2646 = 1029 + 810/2646 = 1839/2646 - 1839/2646 simplified gives 613/882
- So, 21/54 + 15/49 = 613/882
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/54+15/49 21/54+30/49 21/54+15/98 63/54+15/49 21/54+45/49 21/54+75/49