-74.81% is the change from 393 to 99
Calculation steps:
[( 99 - 393 ) ÷ 393] x 100 = -74.81%
Formula
Percentage change = [(99 - 393) / 393] x 100
Subtract the new number by the original number
99 - 393 = -294
-294 ÷ 393 = -0.7480916030534351
-0.7480916030534351 x 100 = -74.81%