Add 84/56 and 9/72
1st number: 1 28/56, 2nd number: 9/72
84/56 + 9/72 is 13/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
84/56 = 84 × 9/56 × 9 = 756/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
9/72 = 9 × 7/72 × 7 = 63/504 - Add the two like fractions:
756/504 + 63/504 = 756 + 63/504 = 819/504 - 819/504 simplified gives 13/8
- So, 84/56 + 9/72 = 13/8
In mixed form: 15/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56+18/72 84/56+27/72 84/56+45/72 84/56+63/72