Add 81/84 and 27/90
81/84 + 27/90 is 177/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
81/84 = 81 × 15/84 × 15 = 1215/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
27/90 = 27 × 14/90 × 14 = 378/1260 - Add the two like fractions:
1215/1260 + 378/1260 = 1215 + 378/1260 = 1593/1260 - 1593/1260 simplified gives 177/140
- So, 81/84 + 27/90 = 177/140
In mixed form: 137/140
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