-47.95% is the change from 171 to 89
Calculation steps:
[( 89 - 171 ) ÷ 171] x 100 = -47.95%
Formula
Percentage change = [(89 - 171) / 171] x 100
Subtract the new number by the original number
89 - 171 = -82
-82 ÷ 171 = -0.47953216374269003
-0.47953216374269003 x 100 = -47.95%