-50.05% is the change from 995 to 497
Calculation steps:
[( 497 - 995 ) ÷ 995] x 100 = -50.05%
Formula
Percentage change = [(497 - 995) / 995] x 100
Subtract the new number by the original number
497 - 995 = -498
-498 ÷ 995 = -0.5005025125628141
-0.5005025125628141 x 100 = -50.05%