-35.16% is the change from 310 to 201
Calculation steps:
[( 201 - 310 ) ÷ 310] x 100 = -35.16%
Formula
Percentage change = [(201 - 310) / 310] x 100
Subtract the new number by the original number
201 - 310 = -109
-109 ÷ 310 = -0.35161290322580646
-0.35161290322580646 x 100 = -35.16%