Add 21/49 and 7/63
21/49 + 7/63 is 34/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 63 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 49 × 9 = 441,
21/49 = 21 × 9/49 × 9 = 189/441 - Likewise, for the 2nd fraction, since 63 × 7 = 441,
7/63 = 7 × 7/63 × 7 = 49/441 - Add the two like fractions:
189/441 + 49/441 = 189 + 49/441 = 238/441 - 238/441 simplified gives 34/63
- So, 21/49 + 7/63 = 34/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49+7/63 21/49+14/63 21/98+7/63 63/49+7/63 21/49+21/63 21/49+35/63 21/49+49/63