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2016 CEMC Gauss (Grade 8) Problems/Problem 2

Problem

Which of the following is equal to $\frac{4}{5}$?

$\text{ (A) }\ 4.5 \qquad\text{ (B) }\ 0.8 \qquad\text{ (C) }\ 80.0 \qquad\text{ (D) }\ 0.08 \qquad\text{ (E) }\ 0.45$

Solution 1

$\frac{4}{5} = \frac{4 \times 2}{5 \times 2} = \frac{8}{10} = \boxed {\textbf {(B) } 0.8}$

~anabel.disher

Solution 2

$\frac{4}{5} = 4 \times 0.2 = \boxed {\textbf {(B) } 0.8}$

~anabel.disher

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