-21.07% is the change from 859 to 678
Calculation steps:
[( 678 - 859 ) ÷ 859] x 100 = -21.07%
Formula
Percentage change = [(678 - 859) / 859] x 100
Subtract the new number by the original number
678 - 859 = -181
-181 ÷ 859 = -0.21071012805587894
-0.21071012805587894 x 100 = -21.07%