-50.15% is the change from 343 to 171
Calculation steps:
[( 171 - 343 ) ÷ 343] x 100 = -50.15%
Formula
Percentage change = [(171 - 343) / 343] x 100
Subtract the new number by the original number
171 - 343 = -172
-172 ÷ 343 = -0.5014577259475219
-0.5014577259475219 x 100 = -50.15%