Add 81/72 and 20/28
1st number: 1 9/72, 2nd number: 20/28
81/72 + 20/28 is 103/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 28 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 28 × 18 = 504,
20/28 = 20 × 18/28 × 18 = 360/504 - Add the two like fractions:
567/504 + 360/504 = 567 + 360/504 = 927/504 - 927/504 simplified gives 103/56
- So, 81/72 + 20/28 = 103/56
In mixed form: 147/56
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