-37.54% is the change from 309 to 193
Calculation steps:
[( 193 - 309 ) ÷ 309] x 100 = -37.54%
Formula
Percentage change = [(193 - 309) / 309] x 100
Subtract the new number by the original number
193 - 309 = -116
-116 ÷ 309 = -0.37540453074433655
-0.37540453074433655 x 100 = -37.54%