Question

a count went from 605 to 203. what was the approximate percent decrease? round the numbers to find an estimate of the percent decrease.
the percent decrease was approximately 25%.
the percent decrease was approximately 33%.
the percent decrease was approximately 50%.
the percent decrease was approximately 66%.

Explanation:

Step1: Find the decrease amount

The original amount is 605, the new amount is 203. The decrease amount is $605 - 203 = 402$.

Step2: Calculate percent decrease

The formula for percent decrease is $\frac{\text{Decrease}}{\text{Original Amount}} \times 100\%$. So we have $\frac{402}{605} \times 100\%$. Approximating, $\frac{402}{605} \approx 0.664$, so $0.664\times 100\% = 66.4\% \approx 66\%$.

Answer:

The percent decrease was approximately 66% (the option: The percent decrease was approximately 66%).