The Discover credit card is advertising a special 3% cash-back bonus on all grocery store and restaurant purchases. Discover Card users also receive the regular 1% cash-back bonus on all other purchases.
Imagine that you typically charge a total of $1500 a month. Of those $1500 charged, 1/4 is for purchases in grocery stores and restaurants. Use this information to calculate the amount of your monthly cash-back bonus.
