What is the percentage increase/decrease from 1990 to 9960?

Answer: The percentage change is 400.5%.

Let's see how we can calculate this percentage: what is the percentage increase/decrease from 1990 to 9960? Here is a very simple step-by-step guide to find out.

Step 1: We use the following formula:

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

• \(X = 1990\)
• \(Y = 9960\)
• Percentage change calculation = \({9960-1990 \over 1990}\) = \({7970 \over 1990}\) = \(4.0050251256281\)

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

\(4.005\) = \(400.5 \over 100 \) = \(400.5\%\)

\(Answer: \) The percentage change is 400.5%.

What is the percentage increase/decrease from 1990 to 9960? 400.5 percent.

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