-50% is the change from 386 to 193
Calculation steps:
[( 193 - 386 ) ÷ 386] x 100 = -50%
Formula
Percentage change = [(193 - 386) / 386] x 100
Subtract the new number by the original number
193 - 386 = -193
-193 ÷ 386 = -0.5
-0.5 x 100 = -50%
Example