-99.05% is the change from 315 to 3
Calculation steps:
[( 3 - 315 ) ÷ 315] x 100 = -99.05%
Formula
Percentage change = [(3 - 315) / 315] x 100
Subtract the new number by the original number
3 - 315 = -312
-312 ÷ 315 = -0.9904761904761905
-0.9904761904761905 x 100 = -99.05%