Add 90/81 and 20/36
1st number: 1 9/81, 2nd number: 20/36
90/81 + 20/36 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 36 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
90/81 = 90 × 4/81 × 4 = 360/324 - Likewise, for the 2nd fraction, since 36 × 9 = 324,
20/36 = 20 × 9/36 × 9 = 180/324 - Add the two like fractions:
360/324 + 180/324 = 360 + 180/324 = 540/324 - 540/324 simplified gives 5/3
- So, 90/81 + 20/36 = 5/3
In mixed form: 12/3
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