Given:
In $22 per month or 625 mintes
Per minute cost is:
[tex]\begin{gathered} \because625\text{ mintes cost is 22} \\ \therefore1\text{ mnutes cost is }\frac{22}{625} \end{gathered}[/tex]So per minute cost is:
[tex]\begin{gathered} =\frac{22}{625} \\ =0.0352 \end{gathered}[/tex]So per mintues cost is $0.0352
