-33.23% is the change from 310 to 207
Calculation steps:
[( 207 - 310 ) ÷ 310] x 100 = -33.23%
Formula
Percentage change = [(207 - 310) / 310] x 100
Subtract the new number by the original number
207 - 310 = -103
-103 ÷ 310 = -0.33225806451612905
-0.33225806451612905 x 100 = -33.23%