Add 21/36 and 3/28
21/36 + 3/28 is 29/42.
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,
3/28 = 3 × 9/28 × 9 = 27/252 - Add the two like fractions:
147/252 + 27/252 = 147 + 27/252 = 174/252 - 174/252 simplified gives 29/42
- So, 21/36 + 3/28 = 29/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36+3/28 21/36+6/28 21/72+3/28 21/36+3/56 63/36+3/28 21/36+9/28 21/36+3/84 21/36+15/28 21/36+21/28