-38.24% is the change from 306 to 189
Calculation steps:
[( 189 - 306 ) ÷ 306] x 100 = -38.24%
Formula
Percentage change = [(189 - 306) / 306] x 100
Subtract the new number by the original number
189 - 306 = -117
-117 ÷ 306 = -0.38235294117647056
-0.38235294117647056 x 100 = -38.24%