Add 9/21 and 7/18
9/21 + 7/18 is 103/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
9/21 = 9 × 6/21 × 6 = 54/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
7/18 = 7 × 7/18 × 7 = 49/126 - Add the two like fractions:
54/126 + 49/126 = 54 + 49/126 = 103/126 - So, 9/21 + 7/18 = 103/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+7/18 9/21+14/18 9/42+7/18 9/21+7/36 27/21+7/18 9/21+21/18 9/63+7/18 9/21+7/54 45/21+7/18 9/21+35/18 9/21+7/90 63/21+7/18 9/21+49/18