Add 84/72 and 3/7
1st number: 1 12/72, 2nd number: 3/7
84/72 + 3/7 is 67/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
84/72 = 84 × 7/72 × 7 = 588/504 - Likewise, for the 2nd fraction, since 7 × 72 = 504,
3/7 = 3 × 72/7 × 72 = 216/504 - Add the two like fractions:
588/504 + 216/504 = 588 + 216/504 = 804/504 - 804/504 simplified gives 67/42
- So, 84/72 + 3/7 = 67/42
In mixed form: 125/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/72+6/7 84/72+3/14 84/72+9/7 84/72+3/21 84/72+15/7 84/72+3/35 84/72+21/7 84/72+3/49