-33.01% is the change from 312 to 209
Calculation steps:
[( 209 - 312 ) ÷ 312] x 100 = -33.01%
Formula
Percentage change = [(209 - 312) / 312] x 100
Subtract the new number by the original number
209 - 312 = -103
-103 ÷ 312 = -0.3301282051282051
-0.3301282051282051 x 100 = -33.01%