Question

Jessica purchased a prepaid phone card for $15 . Long distance calls cost 22 cents a minute using this card. Jessica used her card only once to make a long distance call. If the remaining credit on her card is $11.92 , how many minutes did her call last?

Answer 1

simply subtract $11.92 from $15.00 then divide that by $0.22 to get the minutes
so..


`15.00 - 11.92 = 3.08`

`3.08 / .22 = 14`

`14 \: minutes`