-97.79% is the change from 859 to 19
Calculation steps:
[( 19 - 859 ) ÷ 859] x 100 = -97.79%
Formula
Percentage change = [(19 - 859) / 859] x 100
Subtract the new number by the original number
19 - 859 = -840
-840 ÷ 859 = -0.9778812572759022
-0.9778812572759022 x 100 = -97.79%