-19.91% is the change from 859 to 688
Calculation steps:
[( 688 - 859 ) ÷ 859] x 100 = -19.91%
Formula
Percentage change = [(688 - 859) / 859] x 100
Subtract the new number by the original number
688 - 859 = -171
-171 ÷ 859 = -0.1990686845168801
-0.1990686845168801 x 100 = -19.91%