-83.8% is the change from 395 to 64
Calculation steps:
[( 64 - 395 ) ÷ 395] x 100 = -83.8%
Formula
Percentage change = [(64 - 395) / 395] x 100
Subtract the new number by the original number
64 - 395 = -331
-331 ÷ 395 = -0.8379746835443038
-0.8379746835443038 x 100 = -83.8%