-96.39% is the change from 305 to 11
Calculation steps:
[( 11 - 305 ) ÷ 305] x 100 = -96.39%
Formula
Percentage change = [(11 - 305) / 305] x 100
Subtract the new number by the original number
11 - 305 = -294
-294 ÷ 305 = -0.9639344262295082
-0.9639344262295082 x 100 = -96.39%