Question: Rookie police officers have to buy duty shoes at the full price of $85, but officers who have served at least a year get a 20% discount. Officers who have served at least three years get an additional 25% off the discounted price. How much does an officer who has served at least three years have to pay for shoes? Think carefully first, then make a decision:
Cops that served a year pay $85 * 0.2 = $17 less. Cops that served a year pay $85 - $17 = $68. Cops that served at least 3 years get a $68 * 0.25 = $17 discount. Cops that served at least 3 years pay $68 - $17 = $51 for shoes. So the answer is 51.