Add 72/81 and 70/72
72/81 + 70/72 is 67/36.
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,
70/72 = 70 × 9/72 × 9 = 630/648 - Add the two like fractions:
576/648 + 630/648 = 576 + 630/648 = 1206/648 - 1206/648 simplified gives 67/36
- So, 72/81 + 70/72 = 67/36
In mixed form: 131/36
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