Question

A worker's salary increased from $750 to $900 per month. Which equation shows the increase of the worker's salary to the nearest percent?

Answer 1

`A+(x)/(100)A=B`

where A is the first value, B the second value and x the percent

we can solve x

`\begin{gathered} (x)/(100)A=B-A \\ x=(100*(B-A))/(A) \end{gathered}`

this is the equation

and this is the percent:

`\begin{gathered} x=(100*(900-750))/(750) \\ \\ x=20 \end{gathered}`

the percent is 20%