Question

The population of a city increases by 2.3% per year. If this year's population is pp, which expression represents next year's population?

Answer 1

The population of a city increases by 2.3% per year. If this year’s population is pp, then next year’s population will be pp plus 2.3% of pp. To find 2.3% of pp, we can multiply pp by 0.023, which is the decimal equivalent of 2.3%.

Therefore, the expression for next year’s population is:

pp+0.023pp

We can simplify this expression by factoring out pp:

pp(1+0.023)