Question

What is the percent of increase from 25 to 35?

A.
10%

B.
29%

C.
40%

D.
71%

Answer 1

40% ?

Answer 2

if we take 25 to be the 100%
then what's the difference between 25 and 35? well, clearly 10

so what is 10 of 25 then?
\(\bf \begin{array}{ccllll}
amount&\%
\\\hline\\
25&100\\
10&x
\end{array}\implies \cfrac{25}{10}=\cfrac{100}{x}\impliedby \textit{solve for "x"}\)

Answer 3

so is 40% right?

Answer 4

Yes!

Answer 5

good job!