Question

The city of Sine conducts a traffic study to determine whether a new red light is needed at an intersection downtown. According to a previous study, the number of cars passing through the intersection daily in 1999 was 124. The current study shows 374 cars pass through the intersection daily. What is the percent change in the number of cars passing through the intersection daily? Round your answer to the nearest tenth of a percent.
$$ explain why.

Answer 1

According to previous study, 124 cars cross intersection daily. According to current study 374 cars cross intersection daily.

Percentage increase in number of cars

$$\Delta =\cfrac{374-124}{124} \times 100\\ =201.6112\%$$

Up to nearest tenth of a percent

$$\Delta\approx 201.6\%$$