To determine what to multiply the current population by to find next year's population after a 5% decrease, we can start by considering what a 5% decrease means in terms of the remaining population.
If the population decreases by 5%, this means that 95% of the current population will remain. To express this as a multiplication factor, you can convert the percentage to a decimal:
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Find 5% in decimal: \[ 5% = 0.05 \]
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Subtract this value from 1 to find the remaining percentage: \[ 1 - 0.05 = 0.95 \]
Therefore, to find next year's population given the current population, you should multiply the current population by 0.95.
In summary, to find next year's population, multiply the current population by 0.95.