-3.38% is the change from 888 to 858
Calculation steps:
[( 858 - 888 ) ÷ 888] x 100 = -3.38%
Formula
Percentage change = [(858 - 888) / 888] x 100
Subtract the new number by the original number
858 - 888 = -30
-30 ÷ 888 = -0.033783783783783786
-0.033783783783783786 x 100 = -3.38%