Answer:
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Step-by-step explanation:
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Both of the fractions can be added since they both have 8 as the denominator 3/8+5/8=8/8 which is a whole.
There are a lot of things that are equivalent to 16/81.
16/81 = 0.197530864
Or we can keep multiplying 2 to the numerator and denominator:
16/81 = 32/162 = 64/324 = 128/648