A city's population grew from $120,000$ to $138,000$ people in one year. What is the percent increase in population?

• A. $0.15\%$
• B. $15\%$
• C. $13\%$
• D. $0.13\%$

Answer: (B)

Verified step by step guidance

1. Identify the original population and the new population. Here, the original population is \$120,000$ and the new population is \$138,000$.
2. Calculate the amount of increase in population by subtracting the original population from the new population: \(138,000 - 120,000\).
3. Find the percent increase by dividing the increase by the original population: \(\frac{138,000 - 120,000}{120,000}\).
4. Convert the fraction to a decimal by performing the division.
5. Multiply the decimal by 100 to convert it to a percentage, which gives the percent increase in population.