Add 81/90 and 84/63
1st number: 81/90, 2nd number: 1 21/63
81/90 + 84/63 is 67/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
81/90 = 81 × 7/90 × 7 = 567/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
84/63 = 84 × 10/63 × 10 = 840/630 - Add the two like fractions:
567/630 + 840/630 = 567 + 840/630 = 1407/630 - 1407/630 simplified gives 67/30
- So, 81/90 + 84/63 = 67/30
In mixed form: 27/30
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