Add 63/84 and 9/72
63/84 + 9/72 is 7/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
63/84 = 63 × 6/84 × 6 = 378/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
9/72 = 9 × 7/72 × 7 = 63/504 - Add the two like fractions:
378/504 + 63/504 = 378 + 63/504 = 441/504 - 441/504 simplified gives 7/8
- So, 63/84 + 9/72 = 7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/84+18/72 63/84+27/72 63/84+45/72 63/84+63/72