The population of a town increases by 6% every year. If the present population is 15900, find its population a year ago.

Explanation

To find the population of the town a year ago, we can follow these steps:

### Step 1: Understand the relationship between the present population and the population a year ago.
The present population increases by 6% each year. This means that the present population (P) can be expressed in terms of the population a year ago (X) as follows:
\[ P = X + 0.06X \]
This can be simplified to:
\[ P = 1.06X \]

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