-50.35% is the change from 997 to 495
Calculation steps:
[( 495 - 997 ) ÷ 997] x 100 = -50.35%
Formula
Percentage change = [(495 - 997) / 997] x 100
Subtract the new number by the original number
495 - 997 = -502
-502 ÷ 997 = -0.5035105315947843
-0.5035105315947843 x 100 = -50.35%