-33.55% is the change from 310 to 206
Calculation steps:
[( 206 - 310 ) ÷ 310] x 100 = -33.55%
Formula
Percentage change = [(206 - 310) / 310] x 100
Subtract the new number by the original number
206 - 310 = -104
-104 ÷ 310 = -0.33548387096774196
-0.33548387096774196 x 100 = -33.55%