Add 72/81 and 7/72
72/81 + 7/72 is 71/72.
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,
72/81 = 72 × 8/81 × 8 = 576/648 - Likewise, for the 2nd fraction, since 72 × 9 = 648,
7/72 = 7 × 9/72 × 9 = 63/648 - Add the two like fractions:
576/648 + 63/648 = 576 + 63/648 = 639/648 - 639/648 simplified gives 71/72
- So, 72/81 + 7/72 = 71/72
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