-98.42% is the change from 506 to 8
Calculation steps:
[( 8 - 506 ) ÷ 506] x 100 = -98.42%
Formula
Percentage change = [(8 - 506) / 506] x 100
Subtract the new number by the original number
8 - 506 = -498
-498 ÷ 506 = -0.9841897233201581
-0.9841897233201581 x 100 = -98.42%