-39.88% is the change from 321 to 193
Calculation steps:
[( 193 - 321 ) ÷ 321] x 100 = -39.88%
Formula
Percentage change = [(193 - 321) / 321] x 100
Subtract the new number by the original number
193 - 321 = -128
-128 ÷ 321 = -0.3987538940809969
-0.3987538940809969 x 100 = -39.88%