-89.25% is the change from 186 to 20
Calculation steps:
[( 20 - 186 ) ÷ 186] x 100 = -89.25%
Formula
Percentage change = [(20 - 186) / 186] x 100
Subtract the new number by the original number
20 - 186 = -166
-166 ÷ 186 = -0.8924731182795699
-0.8924731182795699 x 100 = -89.25%