Question

Refer to the graph By approximately what percentage (relative change) did measles decline between 2014-2015? Round your answer to two decimal places.

Answer 1

Conisder that the cases of measles in 2014 and 2015 were, respectively:

2014: 300,000 (approximately)

2015: 250,000

In order to determine the percentage of decrease, proceed as follow:

subtract 250,000 to 300,000:

300,000 - 250,000 = 50,000

next, calculate the relative percentage of 50,000 related to 300,000. If x is such percentage, then, you can write:

$\frac{x}{100}\cdot300,000=50,000$

By solving for x, you obtain:

$x=\frac{50,000}{300,000}\cdot100\approx16.7$

Hence, by approximately 16.7% the measles declined between 2014-2015