-26.47% is the change from 306 to 225
Calculation steps:
[( 225 - 306 ) ÷ 306] x 100 = -26.47%
Formula
Percentage change = [(225 - 306) / 306] x 100
Subtract the new number by the original number
225 - 306 = -81
-81 ÷ 306 = -0.2647058823529412
-0.2647058823529412 x 100 = -26.47%