-33.02% is the change from 315 to 211
Calculation steps:
[( 211 - 315 ) ÷ 315] x 100 = -33.02%
Formula
Percentage change = [(211 - 315) / 315] x 100
Subtract the new number by the original number
211 - 315 = -104
-104 ÷ 315 = -0.33015873015873015
-0.33015873015873015 x 100 = -33.02%