-2.33% is the change from 859 to 839
Calculation steps:
[( 839 - 859 ) ÷ 859] x 100 = -2.33%
Formula
Percentage change = [(839 - 859) / 859] x 100
Subtract the new number by the original number
839 - 859 = -20
-20 ÷ 859 = -0.023282887077997673
-0.023282887077997673 x 100 = -2.33%