-98.11% is the change from 423 to 8
Calculation steps:
[( 8 - 423 ) ÷ 423] x 100 = -98.11%
Formula
Percentage change = [(8 - 423) / 423] x 100
Subtract the new number by the original number
8 - 423 = -415
-415 ÷ 423 = -0.9810874704491725
-0.9810874704491725 x 100 = -98.11%