Add 70/15 and 20/81
1st number: 4 10/15, 2nd number: 20/81
70/15 + 20/81 is 398/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
70/15 = 70 × 27/15 × 27 = 1890/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
20/81 = 20 × 5/81 × 5 = 100/405 - Add the two like fractions:
1890/405 + 100/405 = 1890 + 100/405 = 1990/405 - 1990/405 simplified gives 398/81
- So, 70/15 + 20/81 = 398/81
In mixed form: 474/81
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