Add 81/84 and 90/63
1st number: 81/84, 2nd number: 1 27/63
81/84 + 90/63 is 67/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
81/84 = 81 × 3/84 × 3 = 243/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
90/63 = 90 × 4/63 × 4 = 360/252 - Add the two like fractions:
243/252 + 360/252 = 243 + 360/252 = 603/252 - 603/252 simplified gives 67/28
- So, 81/84 + 90/63 = 67/28
In mixed form: 211/28
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