4/8 + 3/8 = = 0.875
Add: +
= =
The common denominator you can calculate as the least common multiple of the both denominators - LCM(8, 8) = 8
Note that the two fractions have common denominators. Because they have common denominators, you can just combine the terms:
4/8 + 3/8 = (4 + 3)/8 = 7/8
7/8 is your answer
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