-85.39% is the change from 438 to 64
Calculation steps:
[( 64 - 438 ) ÷ 438] x 100 = -85.39%
Formula
Percentage change = [(64 - 438) / 438] x 100
Subtract the new number by the original number
64 - 438 = -374
-374 ÷ 438 = -0.8538812785388128
-0.8538812785388128 x 100 = -85.39%