Add 84/42 and 28/72
1st number: 2 0/42, 2nd number: 28/72
84/42 + 28/72 is 43/18.
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,
84/42 = 84 × 12/42 × 12 = 1008/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
28/72 = 28 × 7/72 × 7 = 196/504 - Add the two like fractions:
1008/504 + 196/504 = 1008 + 196/504 = 1204/504 - 1204/504 simplified gives 43/18
- So, 84/42 + 28/72 = 43/18
In mixed form: 27/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+56/72 84/42+84/72