Add 15/28 and 15/36
15/28 + 15/36 is 20/21.
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,
15/28 = 15 × 9/28 × 9 = 135/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
15/36 = 15 × 7/36 × 7 = 105/252 - Add the two like fractions:
135/252 + 105/252 = 135 + 105/252 = 240/252 - 240/252 simplified gives 20/21
- So, 15/28 + 15/36 = 20/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+15/36 15/28+30/36 15/56+15/36 15/28+15/72 45/28+15/36 15/28+45/36 15/84+15/36 75/28+15/36 15/28+75/36