To find the percentage of cars that were traveling east, we can use the following formula:
percentage = (part / whole) x 100%
where "part" is the number of cars traveling east, and "whole" is the total number of cars counted.
In this case, we know that 6,020 cars were traveling east, out of a total of 7,000 cars counted. So we can plug these values into the formula:
percentage = (6,020 / 7,000) x 100%
percentage = 0.86 x 100%
percentage = 86%
Therefore, 86% of the cars counted were traveling east across the toll bridge.