-99.1% is the change from 333 to 3
Calculation steps:
[( 3 - 333 ) ÷ 333] x 100 = -99.1%
Formula
Percentage change = [(3 - 333) / 333] x 100
Subtract the new number by the original number
3 - 333 = -330
-330 ÷ 333 = -0.990990990990991
-0.990990990990991 x 100 = -99.1%