-22.42% is the change from 397 to 308
Calculation steps:
[( 308 - 397 ) ÷ 397] x 100 = -22.42%
Formula
Percentage change = [(308 - 397) / 397] x 100
Subtract the new number by the original number
308 - 397 = -89
-89 ÷ 397 = -0.22418136020151133
-0.22418136020151133 x 100 = -22.42%