Add 2/28 and 21/18
1st number: 2/28, 2nd number: 1 3/18
2/28 + 21/18 is 26/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
2/28 = 2 × 9/28 × 9 = 18/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
21/18 = 21 × 14/18 × 14 = 294/252 - Add the two like fractions:
18/252 + 294/252 = 18 + 294/252 = 312/252 - 312/252 simplified gives 26/21
- So, 2/28 + 21/18 = 26/21
In mixed form: 15/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/28+21/18 2/28+42/18 2/56+21/18 2/28+21/36 6/28+21/18 2/28+63/18 2/84+21/18 2/28+21/54 10/28+21/18 2/28+21/90 14/28+21/18