Add 40/81 and 42/72
40/81 + 42/72 is 349/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 72 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
40/81 = 40 × 8/81 × 8 = 320/648 - Likewise, for the 2nd fraction, since 72 × 9 = 648,
42/72 = 42 × 9/72 × 9 = 378/648 - Add the two like fractions:
320/648 + 378/648 = 320 + 378/648 = 698/648 - 698/648 simplified gives 349/324
- So, 40/81 + 42/72 = 349/324
In mixed form: 125/324
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