-51.6% is the change from 343 to 166
Calculation steps:
[( 166 - 343 ) ÷ 343] x 100 = -51.6%
Formula
Percentage change = [(166 - 343) / 343] x 100
Subtract the new number by the original number
166 - 343 = -177
-177 ÷ 343 = -0.5160349854227405
-0.5160349854227405 x 100 = -51.6%