Add 3/15 and 70/81
3/15 + 70/81 is 431/405.
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,
3/15 = 3 × 27/15 × 27 = 81/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
70/81 = 70 × 5/81 × 5 = 350/405 - Add the two like fractions:
81/405 + 350/405 = 81 + 350/405 = 431/405 - So, 3/15 + 70/81 = 431/405
In mixed form: 126/405
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