Add 81/21 and 54/9
1st number: 3 18/21, 2nd number: 6 0/9
81/21 + 54/9 is 69/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
81/21 = 81 × 3/21 × 3 = 243/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
54/9 = 54 × 7/9 × 7 = 378/63 - Add the two like fractions:
243/63 + 378/63 = 243 + 378/63 = 621/63 - 621/63 simplified gives 69/7
- So, 81/21 + 54/9 = 69/7
In mixed form: 96/7
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