-68.42% is the change from 171 to 54
Calculation steps:
[( 54 - 171 ) ÷ 171] x 100 = -68.42%
Formula
Percentage change = [(54 - 171) / 171] x 100
Subtract the new number by the original number
54 - 171 = -117
-117 ÷ 171 = -0.6842105263157895
-0.6842105263157895 x 100 = -68.42%