Question

The cost of a pound of nails increased from $2.12 to $2.26. What is the percent of increase to the nearest whole-number percent?The percent of increase is %. (Type an integer.)

Answer 1

Set

`\begin{gathered} 2.12\rightarrow100\% \\ 2.26\rightarrow x\% \end{gathered}`

which is equivalent to

`(100)/(2.12)=(x)/(2.26)`

Solving for x,

`\Rightarrow x=(226)/(2.12)=106.60377...\approx107`

Then 107-100=7%. Therefore, the percentage of increase is 7%