# Carpenter

From wooden block carpenter cut off a small cuboid block with half the edge length. How many percent of wood he cut off?

Correct result:

p =  12.5 %

#### Solution:

$p = \dfrac{(a/2)(b/2)(c/2)}{ abc}100 = \dfrac{1}{8}\cdot 100 = 12.5 \%$

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