Question

4. The earth's population is 7.8 billion today. What is the percent change in the lastdecade if the global population was 7.0 billion in 2011

Answer 1

We can figure this out easily

First subtract 7.8 billion by 7.0 billion:
You end up with 0.8 billion

Now simply divide .8 by 7:
.1142% is your answer :)

Answer 2

Percentage change equals the change in value divided by the absolute value of the original value, multiplied by 100. That is: