To find the percentage change from 200 to 150, we need to first calculate the difference between the two numbers.

Step 1: Difference = Final Value - Initial Value

Difference = 150 - 200

Difference = -50

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 = |-50|

Absolute Difference = 50

Step 3: Now, we can calculate the percentage change using the formula:

Percentage Change = (Absolute Difference / Initial Value) x 100

Percentage Change = (50 / 200) x 100

Percentage Change = 25%

Therefore, the percentage change from 200 to 150 is -25%. This means that there was a decrease of 25% from 200 to 150.