Add 4/21 and 24/27
4/21 + 24/27 is 68/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
4/21 = 4 × 9/21 × 9 = 36/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
24/27 = 24 × 7/27 × 7 = 168/189 - Add the two like fractions:
36/189 + 168/189 = 36 + 168/189 = 204/189 - 204/189 simplified gives 68/63
- So, 4/21 + 24/27 = 68/63
In mixed form: 15/63
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