Add 18/21 and 28/6
1st number: 18/21, 2nd number: 4 4/6
18/21 + 28/6 is 116/21.
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,
18/21 = 18 × 2/21 × 2 = 36/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
28/6 = 28 × 7/6 × 7 = 196/42 - Add the two like fractions:
36/42 + 196/42 = 36 + 196/42 = 232/42 - 232/42 simplified gives 116/21
- So, 18/21 + 28/6 = 116/21
In mixed form: 511/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+28/6 18/21+56/6 18/42+28/6 18/21+28/12 54/21+28/6 18/21+84/6 18/63+28/6 18/21+28/18 90/21+28/6 18/21+28/30 18/21+28/42