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To find the percentage change from 90 to 50, we need to first calculate the difference between the two numbers.
Step 1: Difference = Final Value - Initial Value
Difference = 50 - 90
Difference = -40
Step 2: Next, we need to find the absolute value of the difference. This is because percentage change is always calculated as a positive value.
Absolute Difference = |Difference|
Absolute Difference = |-40|
Absolute Difference = 40
Step 3: Now, we can calculate the percentage change using the formula:
Percentage Change = (Absolute Difference / Initial Value) x 100
Percentage Change = (40 / 90) x 100
Percentage Change = 44.44%
Therefore, the percentage change from 90 to 50 is -44.44%. This means that there was a decrease of 44.44% from 90 to 50.