-1.75% is the change from 858 to 843
Calculation steps:
[( 843 - 858 ) ÷ 858] x 100 = -1.75%
Formula
Percentage change = [(843 - 858) / 858] x 100
Subtract the new number by the original number
843 - 858 = -15
-15 ÷ 858 = -0.017482517482517484
-0.017482517482517484 x 100 = -1.75%