Add 4/21 and 27/63
4/21 + 27/63 is 13/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
4/21 = 4 × 3/21 × 3 = 12/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
27/63 = 27 × 1/63 × 1 = 27/63 - Add the two like fractions:
12/63 + 27/63 = 12 + 27/63 = 39/63 - 39/63 simplified gives 13/21
- So, 4/21 + 27/63 = 13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+27/63 4/21+54/63 4/42+27/63 12/21+27/63 4/21+81/63 4/63+27/63 20/21+27/63 28/21+27/63