The store bought the phone for $140 and sells the cell phone for $315 at a markup of 125%.
An equation is an expression that shows the relationship between two or more variables and numbers.
Let x represent the markup, since the store sells the cell phone for $315, hence:
(315 - 140)/140 * 100% = x
x = 125%
The store bought the phone for $140 and sells the cell phone for $315 at a markup of 125%.
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