A swim race has a total distance of 25 mi. Race officials want to mark the course every 500 yd with a buoy, including one at the finish line. (The starting line does not need a buoy.) How many buoys are needed?

First fill in the blanks on the left side of the equation using three of the ratios shown. Then write your answer on the right side of the equation.

Ratios:

3ft1yd

1yd3ft

5280ft1mi

1mi5280ft

500yd1buoy

1buoy500yd

25mi/1

5280/1mi

1yd/3ft

1buoy/500yd

=

buoys

buoy