Add 90/14 and 84/72
1st number: 6 6/14, 2nd number: 1 12/72
90/14 + 84/72 is 319/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 14 × 36 = 504,
90/14 = 90 × 36/14 × 36 = 3240/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
84/72 = 84 × 7/72 × 7 = 588/504 - Add the two like fractions:
3240/504 + 588/504 = 3240 + 588/504 = 3828/504 - 3828/504 simplified gives 319/42
- So, 90/14 + 84/72 = 319/42
In mixed form: 725/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28+84/72 90/42+84/72 90/70+84/72 90/98+84/72