Number of minutes Reese talked with her mother = 348 minutes
The time she talked with her mother is :-
= 80% of the total minutes she used .
Let the total number of minutes she talked be x .
This can be written as :-
[tex] \frac{80}{100} \times x = 348[/tex]
[tex]x = 348 \div \frac{80}{100} [/tex]
[tex]x = 348 \div \frac{8}{10} [/tex]
[tex]x = \frac{348}{1} \times \frac{10}{8} [/tex]
[tex]x = \frac{3480}{8} [/tex]
[tex]x = 435 \: minutes[/tex]
Therefore , Reese uses a total of 435 minutes .
