Input: To calculate the percentage change from 70 to 56, we need to follow the below steps:

Step 1: Find the difference between the two numbers.

Difference = 70 - 56 = 14

Step 2: Divide the difference by the original number (70) and multiply by 100 to get the percentage change.

Percentage change = (14/70) x 100 = 20%

Step 3: Determine the direction of the change.

Since the output (56) is less than the input (70), the percentage change is a decrease of 20%.

Therefore, the percentage change from 70 to 56 is a decrease of 20%.