Add 9/42 and 28/72
9/42 + 28/72 is 38/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
9/42 = 9 × 12/42 × 12 = 108/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
28/72 = 28 × 7/72 × 7 = 196/504 - Add the two like fractions:
108/504 + 196/504 = 108 + 196/504 = 304/504 - 304/504 simplified gives 38/63
- So, 9/42 + 28/72 = 38/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+28/72 9/42+56/72 9/84+28/72 27/42+28/72 9/42+84/72 45/42+28/72 63/42+28/72