-32.35% is the change from 306 to 207
Calculation steps:
[( 207 - 306 ) ÷ 306] x 100 = -32.35%
Formula
Percentage change = [(207 - 306) / 306] x 100
Subtract the new number by the original number
207 - 306 = -99
-99 ÷ 306 = -0.3235294117647059
-0.3235294117647059 x 100 = -32.35%