Add 81/21 and 30/63
1st number: 3 18/21, 2nd number: 30/63
81/21 + 30/63 is 13/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 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 63 × 1 = 63,
30/63 = 30 × 1/63 × 1 = 30/63 - Add the two like fractions:
243/63 + 30/63 = 243 + 30/63 = 273/63 - 273/63 simplified gives 13/3
- So, 81/21 + 30/63 = 13/3
In mixed form: 41/3
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