Add 20/21 and 30/27
1st number: 20/21, 2nd number: 1 3/27
20/21 + 30/27 is 130/63.
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,
20/21 = 20 × 9/21 × 9 = 180/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
30/27 = 30 × 7/27 × 7 = 210/189 - Add the two like fractions:
180/189 + 210/189 = 180 + 210/189 = 390/189 - 390/189 simplified gives 130/63
- So, 20/21 + 30/27 = 130/63
In mixed form: 24/63
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