Question

Determine if the expression is decreased n by 8% or increased n by 8%.

Answer 1

To determine if each expression is decreased or increased by 8% you can substitute the n in the expressions by 100 and then evaluate the expression, if the result is 92 it decrease, if it is 108 it increase:

First expression: decrease n by 8%

`\begin{gathered} 0.92n \\ 0.92(100)=92 \end{gathered}`

Second expression: increase n by 8%

`\begin{gathered} 1.08n \\ 1.08(100)=108 \end{gathered}`

Third expression: increase n by 8%

`\begin{gathered} n+0.08n \\ 100+0.08n=108 \end{gathered}`

Fourth expression: decreased n by 8%

`\begin{gathered} n-0.08n \\ 100-0.08(100)=92 \end{gathered}`