Add 81/72 and 70/56
1st number: 1 9/72, 2nd number: 1 14/56
81/72 + 70/56 is 19/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 56 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 56 × 9 = 504,
70/56 = 70 × 9/56 × 9 = 630/504 - Add the two like fractions:
567/504 + 630/504 = 567 + 630/504 = 1197/504 - 1197/504 simplified gives 19/8
- So, 81/72 + 70/56 = 19/8
In mixed form: 23/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: