Question

Complete the table make sure round mark's percent to a whole .What is the Average percent for these three students ?And don't worry this is just practice :)

Answer 1

Kelly

40 ----> 100%

36 ----> x

$\begin{gathered} 40x=36\times100 \\ 40x=3600 \\ \frac{40x}{40}=\frac{3600}{40} \\ x=90 \end{gathered}$

answer: 90 %

Gloria

40 --> 100

22 --> x

$\begin{gathered} 40x=2200 \\ \frac{40x}{40}=\frac{2200}{40} \\ x=55 \end{gathered}$

answer: 55%

Mark

40 --> 100

19 --> x

$\begin{gathered} 40x=1900_{} \\ x=47.5 \end{gathered}$

answer: 47.5%

average percent is

(90% + 55% + 47.5% )/3 = 64.2 %