Add 10/21 and 27/63
10/21 + 27/63 is 19/21.
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,
10/21 = 10 × 3/21 × 3 = 30/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
27/63 = 27 × 1/63 × 1 = 27/63 - Add the two like fractions:
30/63 + 27/63 = 30 + 27/63 = 57/63 - 57/63 simplified gives 19/21
- So, 10/21 + 27/63 = 19/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21+27/63 10/21+54/63 10/42+27/63 30/21+27/63 10/21+81/63 10/63+27/63 50/21+27/63 70/21+27/63