Question

The bear population of yellowstone national park goes from 230 bear to 300 bears. What is the percent of change?

Answer 1

so the difference is 300 - 230 = 70.

now, if we take 230 to be the 100%, what is 70 off of in percentage?

$\bf \hspace{34em}|\\\\ \begin{array}{ccll} amount&\%\\ \cline{1-2} 230&100\\ 70&x \end{array}\implies \cfrac{230}{70}=\cfrac{100}{x}\implies \cfrac{23}{7}=\cfrac{100}{x} \\\\\\ 23x=700\implies x=\cfrac{700}{23}\implies x\approx 30.43$

Answer 2

Answer:23%

Step-by-step explanation:

300-230=70

70/300=0.23(3 goes on forever)

So 23%

subtract the original with the decreased value, then divide the answer you get with 300. That should equal 0.23 or 23%