-23.05% is the change from 512 to 394
Calculation steps:
[( 394 - 512 ) ÷ 512] x 100 = -23.05%
Formula
Percentage change = [(394 - 512) / 512] x 100
Subtract the new number by the original number
394 - 512 = -118
-118 ÷ 512 = -0.23046875
-0.23046875 x 100 = -23.05%