-99.01% is the change from 304 to 3
Calculation steps:
[( 3 - 304 ) ÷ 304] x 100 = -99.01%
Formula
Percentage change = [(3 - 304) / 304] x 100
Subtract the new number by the original number
3 - 304 = -301
-301 ÷ 304 = -0.9901315789473685
-0.9901315789473685 x 100 = -99.01%