Add 21/36 and 2/28
21/36 + 2/28 is 55/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
2/28 = 2 × 9/28 × 9 = 18/252 - Add the two like fractions:
147/252 + 18/252 = 147 + 18/252 = 165/252 - 165/252 simplified gives 55/84
- So, 21/36 + 2/28 = 55/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36+2/28 21/36+4/28 21/72+2/28 21/36+2/56 63/36+2/28 21/36+6/28 21/36+2/84 21/36+10/28 21/36+14/28