Add 63/27 and 15/21
1st number: 2 9/27, 2nd number: 15/21
63/27 + 15/21 is 64/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
63/27 = 63 × 7/27 × 7 = 441/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
15/21 = 15 × 9/21 × 9 = 135/189 - Add the two like fractions:
441/189 + 135/189 = 441 + 135/189 = 576/189 - 576/189 simplified gives 64/21
- So, 63/27 + 15/21 = 64/21
In mixed form: 31/21
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