-51.2% is the change from 334 to 163
Calculation steps:
[( 163 - 334 ) ÷ 334] x 100 = -51.2%
Formula
Percentage change = [(163 - 334) / 334] x 100
Subtract the new number by the original number
163 - 334 = -171
-171 ÷ 334 = -0.5119760479041916
-0.5119760479041916 x 100 = -51.2%