Add 21/49 and 4/63
21/49 + 4/63 is 31/63.
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,
4/63 = 4 × 7/63 × 7 = 28/441 - Add the two like fractions:
189/441 + 28/441 = 189 + 28/441 = 217/441 - 217/441 simplified gives 31/63
- So, 21/49 + 4/63 = 31/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49+4/63 21/49+8/63 21/98+4/63 63/49+4/63 21/49+12/63 21/49+20/63 21/49+28/63