-77.42% is the change from 186 to 42
Calculation steps:
[( 42 - 186 ) ÷ 186] x 100 = -77.42%
Formula
Percentage change = [(42 - 186) / 186] x 100
Subtract the new number by the original number
42 - 186 = -144
-144 ÷ 186 = -0.7741935483870968
-0.7741935483870968 x 100 = -77.42%