Question

Find the value of ${0.8}^2$ using fraction form.

• A. 0.54
• B. 0.64
• C. 0.74
• D. 0.84

Answer 1

The correct option is B

0.64

$0.8=\frac{8}{10}$

${0.8}^2=(\frac{8}{10}{)}^2$

$\Rightarrow {0.8}^2=(\frac{8}{10}{)}^2$

$\Rightarrow {0.8}^2=\left(\frac{8^2}{{10}^2}\right)$

$\Rightarrow {0.8}^2=\left(\frac{64}{100}\right)$

$\Rightarrow {0.8}^2=0.64$