-40.63% is the change from 288 to 171
Calculation steps:
[( 171 - 288 ) ÷ 288] x 100 = -40.63%
Formula
Percentage change = [(171 - 288) / 288] x 100
Subtract the new number by the original number
171 - 288 = -117
-117 ÷ 288 = -0.40625
-0.40625 x 100 = -40.63%