Question

question
when a number is decreased by 19%, the result is 66. what is the original number to the nearest tenth?

Explanation:

Step1: Define original number as $x$

Let the original number be $x$.

Step2: Calculate remaining percentage

A 19% decrease means $100\% - 19\% = 81\%$ of $x$ remains, so $0.81x = 66$.

Step3: Solve for $x$

$x = \frac{66}{0.81}$

Step4: Round to nearest tenth

$\frac{66}{0.81} \approx 81.481$, rounded to 81.5

Answer:

81.5