-72.51% is the change from 171 to 47
Calculation steps:
[( 47 - 171 ) ÷ 171] x 100 = -72.51%
Formula
Percentage change = [(47 - 171) / 171] x 100
Subtract the new number by the original number
47 - 171 = -124
-124 ÷ 171 = -0.7251461988304093
-0.7251461988304093 x 100 = -72.51%