-2.45% is the change from 858 to 837
Calculation steps:
[( 837 - 858 ) ÷ 858] x 100 = -2.45%
Formula
Percentage change = [(837 - 858) / 858] x 100
Subtract the new number by the original number
837 - 858 = -21
-21 ÷ 858 = -0.024475524475524476
-0.024475524475524476 x 100 = -2.45%