-50.29% is the change from 344 to 171
Calculation steps:
[( 171 - 344 ) ÷ 344] x 100 = -50.29%
Formula
Percentage change = [(171 - 344) / 344] x 100
Subtract the new number by the original number
171 - 344 = -173
-173 ÷ 344 = -0.502906976744186
-0.502906976744186 x 100 = -50.29%