Add 9/15 and 63/84
9/15 + 63/84 is 27/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
9/15 = 9 × 28/15 × 28 = 252/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
63/84 = 63 × 5/84 × 5 = 315/420 - Add the two like fractions:
252/420 + 315/420 = 252 + 315/420 = 567/420 - 567/420 simplified gives 27/20
- So, 9/15 + 63/84 = 27/20
In mixed form: 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+63/84 9/30+63/84 27/15+63/84 9/45+63/84 45/15+63/84 9/75+63/84 63/15+63/84