-49.85% is the change from 341 to 171
Calculation steps:
[( 171 - 341 ) ÷ 341] x 100 = -49.85%
Formula
Percentage change = [(171 - 341) / 341] x 100
Subtract the new number by the original number
171 - 341 = -170
-170 ÷ 341 = -0.49853372434017595
-0.49853372434017595 x 100 = -49.85%