-45.61% is the change from 171 to 93
Calculation steps:
[( 93 - 171 ) ÷ 171] x 100 = -45.61%
Formula
Percentage change = [(93 - 171) / 171] x 100
Subtract the new number by the original number
93 - 171 = -78
-78 ÷ 171 = -0.45614035087719296
-0.45614035087719296 x 100 = -45.61%