### Instruction: If Billy and Jenny each order a $20 steak along with a $5 drink, how much will Billy have to pay in tips if he wants to cover 80% of a 20% tip for the two of them?### Response: First, we need to figure out how much the cost would be for just one person. To do this, we add the steak and the drink together, finding a cost of 20+5=25 per person.
Since there are two people, this means the total cost is 25*2=50 for both Billy and Jenny.
Then, we need to figure out what a 20% tip for the two of them would be. To do this, we multiply 50*.20=10, as 50*.20=10
Then, we find out what an 80% tip for just Billy would be by multiplying the desired 20% tip of 10 by 80%, finding 10*.8=8 dollars that Billy should contribute.
The answer is 8