-99.02% is the change from 305 to 3
Calculation steps:
[( 3 - 305 ) ÷ 305] x 100 = -99.02%
Formula
Percentage change = [(3 - 305) / 305] x 100
Subtract the new number by the original number
3 - 305 = -302
-302 ÷ 305 = -0.9901639344262295
-0.9901639344262295 x 100 = -99.02%