Percentage 40141

Of the 99 children who attended the ski course, 23 were excellent skiers, 13 were good, 20 were average, and the rest were beginners. Calculate this data as a percentage.

Correct answer:

a =  23.2323 %
b =  13.1313 %
c =  20.202 %
d =  43.4343 %

Step-by-step explanation:

$$\begin{gathered} n=99 \\ a=100\cdot \frac{23}{n}=100\cdot \frac{23}{99}=\frac{100\cdot 23}{99}=\frac{2300}{99}=\frac{2300}{99}\%=23.2323\% \end{gathered}$$

$b=100\cdot \frac{13}{n}=100\cdot \frac{13}{99}=\frac{100\cdot 13}{99}=\frac{1300}{99}=\frac{1300}{99}\%=13.1313\%$

$c=100\cdot \frac{20}{n}=100\cdot \frac{20}{99}=\frac{100\cdot 20}{99}=\frac{2000}{99}=\frac{2000}{99}\%=20.202\%$

$d=100-(a+b+c)=100-(\frac{2300}{99}+\frac{1300}{99}+\frac{2000}{99})=43.4343\%$

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