-51.74% is the change from 344 to 166
Calculation steps:
[( 166 - 344 ) ÷ 344] x 100 = -51.74%
Formula
Percentage change = [(166 - 344) / 344] x 100
Subtract the new number by the original number
166 - 344 = -178
-178 ÷ 344 = -0.5174418604651163
-0.5174418604651163 x 100 = -51.74%