-37.74% is the change from 310 to 193
Calculation steps:
[( 193 - 310 ) ÷ 310] x 100 = -37.74%
Formula
Percentage change = [(193 - 310) / 310] x 100
Subtract the new number by the original number
193 - 310 = -117
-117 ÷ 310 = -0.3774193548387097
-0.3774193548387097 x 100 = -37.74%