Add 21/63 and 63/49
1st number: 21/63, 2nd number: 1 14/49
21/63 + 63/49 is 34/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 49 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 63 × 7 = 441,
21/63 = 21 × 7/63 × 7 = 147/441 - Likewise, for the 2nd fraction, since 49 × 9 = 441,
63/49 = 63 × 9/49 × 9 = 567/441 - Add the two like fractions:
147/441 + 567/441 = 147 + 567/441 = 714/441 - 714/441 simplified gives 34/21
- So, 21/63 + 63/49 = 34/21
In mixed form: 113/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+63/49 21/63+63/98