Add 20/21 and 25/27
20/21 + 25/27 is 355/189.
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,
25/27 = 25 × 7/27 × 7 = 175/189 - Add the two like fractions:
180/189 + 175/189 = 180 + 175/189 = 355/189 - So, 20/21 + 25/27 = 355/189
In mixed form: 1166/189
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