A newspaper subscription costs $10/month. If you purchase an annual subscription you obtain a 20% discount on your total bill. How much do you end up paying if you go with the annual subscription? Let's be accurate as possible.
A year has 12 months. If 1 month costs $10, then a year will cost $12 * 10 = $120 per year without an annual subscription. If the annual subscription has a 20% discount then you would pay $120 * (1 - 20%) = $96 for the annual subscription.
The answer: 96.