Question

The population of Renton, WA, is about 101920people.Ten years ago, the population was about 91 000 people.By what percent did the population increase betweenten years ago and now?

Answer 1

The population increased by 10% between ten years ago and now

Here, we want to get the percentage increase in population

To find the percentage increase, we use the formula below;

`\text{percentage increase = }\frac{new\text{ value -old value}}{\text{old value}}\text{ }*100\text{ percent}`

From the question, new population value is 101,920 while the old population value is 91,000

Substituting these values into the equation, we have it as;

`\begin{gathered} \text{percentage increase = }(101920-91000)/(91000)*\text{ 100\%} \\ \\ =\text{ }(10920)/(91000)\text{ }*\text{ 100\% = 12\%} \end{gathered}`