Add 4/7 and 45/81, Solve 4/7 + 45/81 as a fraction

Add 4/7 and 45/81

4/7 + 45/81 is 71/63.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567

Next, find the equivalent fraction of both fractional numbers with denominator 567
For the 1st fraction, since 7 × 81 = 567,
4/7 = 4 × 81/7 × 81 = 324/567
Likewise, for the 2nd fraction, since 81 × 7 = 567,
45/81 = 45 × 7/81 × 7 = 315/567
Add the two like fractions:
324/567 + 315/567 = 324 + 315/567 = 639/567
639/567 simplified gives 71/63
So, 4/7 + 45/81 = 71/63
In mixed form: 18/63

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