Add 90/81 and 20/45
1st number: 1 9/81, 2nd number: 20/45
90/81 + 20/45 is 14/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 45 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
90/81 = 90 × 5/81 × 5 = 450/405 - Likewise, for the 2nd fraction, since 45 × 9 = 405,
20/45 = 20 × 9/45 × 9 = 180/405 - Add the two like fractions:
450/405 + 180/405 = 450 + 180/405 = 630/405 - 630/405 simplified gives 14/9
- So, 90/81 + 20/45 = 14/9
In mixed form: 15/9
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