Add 9/21 and 21/63
9/21 + 21/63 is 16/21.
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,
9/21 = 9 × 3/21 × 3 = 27/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
21/63 = 21 × 1/63 × 1 = 21/63 - Add the two like fractions:
27/63 + 21/63 = 27 + 21/63 = 48/63 - 48/63 simplified gives 16/21
- So, 9/21 + 21/63 = 16/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+21/63 9/21+42/63 9/42+21/63 27/21+21/63 9/63+21/63 45/21+21/63 63/21+21/63