Add 15/21 and 18/6
1st number: 15/21, 2nd number: 3 0/6
15/21 + 18/6 is 26/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
18/6 = 18 × 7/6 × 7 = 126/42 - Add the two like fractions:
30/42 + 126/42 = 30 + 126/42 = 156/42 - 156/42 simplified gives 26/7
- So, 15/21 + 18/6 = 26/7
In mixed form: 35/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+18/6 15/21+36/6 15/42+18/6 15/21+18/12 45/21+18/6 15/21+54/6 15/63+18/6 75/21+18/6 15/21+90/6 15/21+18/30 15/21+18/42