-31.48% is the change from 305 to 209
Calculation steps:
[( 209 - 305 ) ÷ 305] x 100 = -31.48%
Formula
Percentage change = [(209 - 305) / 305] x 100
Subtract the new number by the original number
209 - 305 = -96
-96 ÷ 305 = -0.31475409836065577
-0.31475409836065577 x 100 = -31.48%