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The population of a city decreases by
2.2% per year. What should we multiply the current population by to find next year's population in one step?
Answer:

The population of a city decreases by $2.2 \%$ per year. What should we multiply the current population by to find next year's population in one step? $\newline$ Answer:

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Multiply and divide rational numbers: word problems

Full solution

Q. The population of a city decreases by

2.2 \%

per year. What should we multiply the current population by to find next year's population in one step?

\newline

Answer:

Subtract percentage from $100$ : To find the multiplier that represents a $2.2\%$ decrease, we need to subtract $2.2\%$ from $100\%$ to see what percentage of the population will remain. $\newline$ Calculation: $100\% - 2.2\% = 97.8\%$
Convert percentage to decimal: Now we need to convert the percentage to a decimal to use it as a multiplier. $\newline$ Calculation: $97.8\% = \frac{97.8}{100} = 0.978$

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