-39.41% is the change from 817 to 495
Calculation steps:
[( 495 - 817 ) ÷ 817] x 100 = -39.41%
Formula
Percentage change = [(495 - 817) / 817] x 100
Subtract the new number by the original number
495 - 817 = -322
-322 ÷ 817 = -0.39412484700122397
-0.39412484700122397 x 100 = -39.41%