-54.97% is the change from 171 to 77
Calculation steps:
[( 77 - 171 ) ÷ 171] x 100 = -54.97%
Formula
Percentage change = [(77 - 171) / 171] x 100
Subtract the new number by the original number
77 - 171 = -94
-94 ÷ 171 = -0.5497076023391813
-0.5497076023391813 x 100 = -54.97%