Input: To calculate the percentage change from 8000 to 20000, we need to follow the below steps:

Step 1: Find the difference between the two numbers.

20000 - 8000 = 12000

Step 2: Divide the difference by the original number (8000) and multiply by 100 to get the percentage change.

(12000/8000) x 100 = 150%

Step 3: Interpret the result.

The percentage change from 8000 to 20000 is 150%. This means that the new value (20000) is 150% of the original value (8000), or in other words, the value has increased by 150%.

In conclusion, the percentage change from 8000 to 20000 is 150%. This indicates a significant increase in value, and it is important to consider this change when analyzing the data.