An MP3 player costs $80. A student has a coupon for 1/4 off. The student saves $7 per week. Assuming the price of the MP3 player does not change, how long will it take the student to save enough to buy it?
1/4 of 80 is 20 ... so the "sale" price is $60
60 / 7 = ? ... round up to the next full week