-52% is the change from 400 to 192
Calculation steps:
[( 192 - 400 ) ÷ 400] x 100 = -52%
Formula
Percentage change = [(192 - 400) / 400] x 100
Subtract the new number by the original number
192 - 400 = -208
-208 ÷ 400 = -0.52
-0.52 x 100 = -52%
Example