Add 12/72 and 45/81
12/72 + 45/81 is 13/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 72 × 9 = 648,
12/72 = 12 × 9/72 × 9 = 108/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
45/81 = 45 × 8/81 × 8 = 360/648 - Add the two like fractions:
108/648 + 360/648 = 108 + 360/648 = 468/648 - 468/648 simplified gives 13/18
- So, 12/72 + 45/81 = 13/18
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