Tinseltown wants to know if their population is in danger. Their current population is 12,000 people but in 2001 it was 15,321. What is their growth rate?

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Answer 1 · 2016-12-29T18:14:49

The population from 2001 until now has decrease by $21.7$ $21.7$ %

The percentage change or rate of change over time can be calculated using the formula:

$p = \frac{N - O}{O} \cdot 100$ $p = (N - O)/O * 100$

Where:

$p$ $p$ is the percentage change (what we are looking for)

$N$ $N$ is the New Value (12,000)

$O$ $O$ is the Old Value (15,321)

Substituting these values into the formula and solving gives:

$p = \frac{12000 - 15321}{15321} \cdot 100$ $p = (12000 - 15321)/15321 * 100$

$p = \frac{- 3321}{15321} \cdot 100$ $p = (-3321)/15321 * 100$

$p = \frac{- 332100}{15321}$ $p = (-332100)/15321$

$p = - 21.7$ $p = -21.7$