Add 20/36 and 42/81
20/36 + 42/81 is 29/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 36 × 9 = 324,
20/36 = 20 × 9/36 × 9 = 180/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
42/81 = 42 × 4/81 × 4 = 168/324 - Add the two like fractions:
180/324 + 168/324 = 180 + 168/324 = 348/324 - 348/324 simplified gives 29/27
- So, 20/36 + 42/81 = 29/27
In mixed form: 12/27
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