-97.79% is the change from 860 to 19
Calculation steps:
[( 19 - 860 ) ÷ 860] x 100 = -97.79%
Formula
Percentage change = [(19 - 860) / 860] x 100
Subtract the new number by the original number
19 - 860 = -841
-841 ÷ 860 = -0.977906976744186
-0.977906976744186 x 100 = -97.79%