Question

On 9th May, 2009, there were 3440 people in the world with swine flu. Of these people, 1639 were in the USA. The 3440 people who had swine flu on 9th May was an increase of 37.6% on the number of people who had swine flu on 8th May. Calculate the number of people who had swine flu on 8th May.

Answer 1

2500

Explanation:

let a represent the number of people that had swine flu on the 8th of May

a increased by 37.6% on the 9th of May. The 37.6% increase is equal to 3440

the equation that can be used to represent this is:

a x 1.376 = 3440

to find a, divide both sides by 1.376

a = 2500