-22.29% is the change from 637 to 495
Calculation steps:
[( 495 - 637 ) ÷ 637] x 100 = -22.29%
Formula
Percentage change = [(495 - 637) / 637] x 100
Subtract the new number by the original number
495 - 637 = -142
-142 ÷ 637 = -0.22291993720565148
-0.22291993720565148 x 100 = -22.29%