-92.98% is the change from 171 to 12
Calculation steps:
[( 12 - 171 ) ÷ 171] x 100 = -92.98%
Formula
Percentage change = [(12 - 171) / 171] x 100
Subtract the new number by the original number
12 - 171 = -159
-159 ÷ 171 = -0.9298245614035088
-0.9298245614035088 x 100 = -92.98%