Add 18/6 and 21/15
1st number: 3 0/6, 2nd number: 1 6/15
18/6 + 21/15 is 22/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 6 × 5 = 30,
18/6 = 18 × 5/6 × 5 = 90/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
21/15 = 21 × 2/15 × 2 = 42/30 - Add the two like fractions:
90/30 + 42/30 = 90 + 42/30 = 132/30 - 132/30 simplified gives 22/5
- So, 18/6 + 21/15 = 22/5
In mixed form: 42/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/6+21/15 18/6+42/15 18/12+21/15 18/6+21/30 54/6+21/15 18/6+63/15 18/6+21/45 90/6+21/15 18/30+21/15 18/6+21/75 18/42+21/15