-57.37% is the change from 936 to 399
Calculation steps:
[( 399 - 936 ) ÷ 936] x 100 = -57.37%
Formula
Percentage change = [(399 - 936) / 936] x 100
Subtract the new number by the original number
399 - 936 = -537
-537 ÷ 936 = -0.5737179487179487
-0.5737179487179487 x 100 = -57.37%