What is the percentage increase/decrease from 1980 to 405?

Answer: The percentage change is -79.55%.

Let's see how we can calculate this percentage: what is the percentage increase/decrease from 1980 to 405? Here is a very simple step-by-step guide to find out.

Step 1: We use the following formula:

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

• \(X = 1980\)
• \(Y = 405\)
• Percentage change calculation = \({405-1980 \over 1980}\) = \({-1575 \over 1980}\) = \(-0.79545454545455\)

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

\(-0.7955\) = \(-79.55 \over 100 \) = \(-79.55\%\)

\(Answer: \) The percentage change is -79.55%.

What is the percentage increase/decrease from 1980 to 405? -79.55 percent.

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