Add 18/28 and 21/36
18/28 + 21/36 is 103/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
18/28 = 18 × 9/28 × 9 = 162/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Add the two like fractions:
162/252 + 147/252 = 162 + 147/252 = 309/252 - 309/252 simplified gives 103/84
- So, 18/28 + 21/36 = 103/84
In mixed form: 119/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+21/36 18/28+42/36 18/56+21/36 18/28+21/72 54/28+21/36 18/28+63/36 18/84+21/36 90/28+21/36