Add 9/36 and 15/21
9/36 + 15/21 is 27/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
9/36 = 9 × 7/36 × 7 = 63/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
15/21 = 15 × 12/21 × 12 = 180/252 - Add the two like fractions:
63/252 + 180/252 = 63 + 180/252 = 243/252 - 243/252 simplified gives 27/28
- So, 9/36 + 15/21 = 27/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/36+15/21 9/36+30/21 9/72+15/21 9/36+15/42 27/36+15/21 9/36+45/21 9/36+15/63 45/36+15/21 9/36+75/21 63/36+15/21