-50.55% is the change from 997 to 493
Calculation steps:
[( 493 - 997 ) ÷ 997] x 100 = -50.55%
Formula
Percentage change = [(493 - 997) / 997] x 100
Subtract the new number by the original number
493 - 997 = -504
-504 ÷ 997 = -0.5055165496489469
-0.5055165496489469 x 100 = -50.55%