Add 9/2 and 9/21
1st number: 4 1/2, 2nd number: 9/21
9/2 + 9/21 is 69/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
9/2 = 9 × 21/2 × 21 = 189/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
9/21 = 9 × 2/21 × 2 = 18/42 - Add the two like fractions:
189/42 + 18/42 = 189 + 18/42 = 207/42 - 207/42 simplified gives 69/14
- So, 9/2 + 9/21 = 69/14
In mixed form: 413/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/2+9/21 9/2+18/21 9/4+9/21 9/2+9/42 27/2+9/21 9/2+27/21 9/6+9/21 9/2+9/63 45/2+9/21 9/2+45/21 9/10+9/21 63/2+9/21 9/2+63/21 9/14+9/21