1.   The exact ratio may vary depending on the method of preparation.

2.   But this ratio varies with temperature, rendering the task of determining snowfall a guessing game.

3.   The ratio varies depending on the size of the crowd, the type of facility and other factors, he said.

4.   The ratios vary widely among the companies.

5.   Passenger-to-toilet ratio varies widely from one airline to another.

6.   Passengers-to-toilet ratio varies widely from one airline to another.

7.   But even Ames was surprised at how widely the passengers-to-toilet ratio can vary from one carrier to another.