Calculate delivery time

Question

I can deliver 42 bats in 1 hour. Write an expression that shows how long it takes to deliver 126 bats.

Answer

STEP 1:    We are given the number of bats that can be delivered in 1 hour. We need to find the time taken to deliver 126 bats. Assume a variable for the time taken to deliver 126 bats, say, t. We can calculate t by dividing the number of bats delivered in t hours by the number of bats delivered in 1 hour.An expression that shows the time taken to deliver 126 bats is: