-87.12% is the change from 326 to 42
Calculation steps:
[( 42 - 326 ) ÷ 326] x 100 = -87.12%
Formula
Percentage change = [(42 - 326) / 326] x 100
Subtract the new number by the original number
42 - 326 = -284
-284 ÷ 326 = -0.8711656441717791
-0.8711656441717791 x 100 = -87.12%