-30.82% is the change from 305 to 211
Calculation steps:
[( 211 - 305 ) ÷ 305] x 100 = -30.82%
Formula
Percentage change = [(211 - 305) / 305] x 100
Subtract the new number by the original number
211 - 305 = -94
-94 ÷ 305 = -0.3081967213114754
-0.3081967213114754 x 100 = -30.82%