Add 81/72 and 90/14
1st number: 1 9/72, 2nd number: 6 6/14
81/72 + 90/14 is 423/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 14 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
81/72 = 81 × 7/72 × 7 = 567/504 - Likewise, for the 2nd fraction, since 14 × 36 = 504,
90/14 = 90 × 36/14 × 36 = 3240/504 - Add the two like fractions:
567/504 + 3240/504 = 567 + 3240/504 = 3807/504 - 3807/504 simplified gives 423/56
- So, 81/72 + 90/14 = 423/56
In mixed form: 731/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/72+90/28 81/72+90/42 81/72+90/70 81/72+90/98