Add 18/6 and 9/21
1st number: 3 0/6, 2nd number: 9/21
18/6 + 9/21 is 24/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
18/6 = 18 × 7/6 × 7 = 126/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
9/21 = 9 × 2/21 × 2 = 18/42 - Add the two like fractions:
126/42 + 18/42 = 126 + 18/42 = 144/42 - 144/42 simplified gives 24/7
- So, 18/6 + 9/21 = 24/7
In mixed form: 33/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/6+9/21 18/6+18/21 18/12+9/21 18/6+9/42 54/6+9/21 18/6+27/21 18/6+9/63 90/6+9/21 18/6+45/21 18/30+9/21 18/6+63/21 18/42+9/21