-93.01% is the change from 186 to 13
Calculation steps:
[( 13 - 186 ) ÷ 186] x 100 = -93.01%
Formula
Percentage change = [(13 - 186) / 186] x 100
Subtract the new number by the original number
13 - 186 = -173
-173 ÷ 186 = -0.9301075268817204
-0.9301075268817204 x 100 = -93.01%