-49.05% is the change from 997 to 508
Calculation steps:
[( 508 - 997 ) ÷ 997] x 100 = -49.05%
Formula
Percentage change = [(508 - 997) / 997] x 100
Subtract the new number by the original number
508 - 997 = -489
-489 ÷ 997 = -0.49047141424272817
-0.49047141424272817 x 100 = -49.05%