Add 9/42 and 3/72
9/42 + 3/72 is 43/168.
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,
3/72 = 3 × 7/72 × 7 = 21/504 - Add the two like fractions:
108/504 + 21/504 = 108 + 21/504 = 129/504 - 129/504 simplified gives 43/168
- So, 9/42 + 3/72 = 43/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+3/72 9/42+6/72 9/84+3/72 27/42+3/72 9/42+9/72 45/42+3/72 9/42+15/72 63/42+3/72 9/42+21/72