-98.02% is the change from 405 to 8
Calculation steps:
[( 8 - 405 ) ÷ 405] x 100 = -98.02%
Formula
Percentage change = [(8 - 405) / 405] x 100
Subtract the new number by the original number
8 - 405 = -397
-397 ÷ 405 = -0.980246913580247
-0.980246913580247 x 100 = -98.02%