-50% is the change from 186 to 93
Calculation steps:
[( 93 - 186 ) ÷ 186] x 100 = -50%
Formula
Percentage change = [(93 - 186) / 186] x 100
Subtract the new number by the original number
93 - 186 = -93
-93 ÷ 186 = -0.5
-0.5 x 100 = -50%
Example