Add 18/28 and 21/8
1st number: 18/28, 2nd number: 2 5/8
18/28 + 21/8 is 183/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
18/28 = 18 × 2/28 × 2 = 36/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
21/8 = 21 × 7/8 × 7 = 147/56 - Add the two like fractions:
36/56 + 147/56 = 36 + 147/56 = 183/56 - So, 18/28 + 21/8 = 183/56
In mixed form: 315/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+21/8 18/28+42/8 18/56+21/8 18/28+21/16 54/28+21/8 18/28+63/8 18/84+21/8 18/28+21/24 90/28+21/8 18/28+21/40 18/28+21/56