-32.14% is the change from 308 to 209
Calculation steps:
[( 209 - 308 ) ÷ 308] x 100 = -32.14%
Formula
Percentage change = [(209 - 308) / 308] x 100
Subtract the new number by the original number
209 - 308 = -99
-99 ÷ 308 = -0.32142857142857145
-0.32142857142857145 x 100 = -32.14%