-22% is the change from 859 to 670
Calculation steps:
[( 670 - 859 ) ÷ 859] x 100 = -22%
Formula
Percentage change = [(670 - 859) / 859] x 100
Subtract the new number by the original number
670 - 859 = -189
-189 ÷ 859 = -0.220023282887078
-0.220023282887078 x 100 = -22%