What is the percentage increase/decrease from 1997 to 400?

Answer: The percentage change is -79.97%.

Let's see how we can calculate this percentage: what is the percentage increase/decrease from 1997 to 400? Here is a very simple step-by-step guide to find out.

Step 1: We use the following formula:

\(\text{Percentage change}\) = \({Y-X \over X} \cdot 100\%\)

• \(X = 1997\)
• \(Y = 400\)
• Percentage change calculation = \({400-1997 \over 1997}\) = \({-1597 \over 1997}\) = \(-0.79969954932399\)

Step 2: A percentage is a number or ratio expressed as a fraction of 100.

\(-0.7997\) = \(-79.97 \over 100 \) = \(-79.97\%\)

\(Answer: \) The percentage change is -79.97%.

What is the percentage increase/decrease from 1997 to 400? -79.97 percent.

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