-50.72% is the change from 347 to 171
Calculation steps:
[( 171 - 347 ) ÷ 347] x 100 = -50.72%
Formula
Percentage change = [(171 - 347) / 347] x 100
Subtract the new number by the original number
171 - 347 = -176
-176 ÷ 347 = -0.5072046109510087
-0.5072046109510087 x 100 = -50.72%