Add 75/84 and 9/72
75/84 + 9/72 is 57/56.
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,
75/84 = 75 × 6/84 × 6 = 450/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
9/72 = 9 × 7/72 × 7 = 63/504 - Add the two like fractions:
450/504 + 63/504 = 450 + 63/504 = 513/504 - 513/504 simplified gives 57/56
- So, 75/84 + 9/72 = 57/56
In mixed form: 11/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/84+18/72 75/84+27/72 75/84+45/72 75/84+63/72