-6.53% is the change from 888 to 830
Calculation steps:
[( 830 - 888 ) ÷ 888] x 100 = -6.53%
Formula
Percentage change = [(830 - 888) / 888] x 100
Subtract the new number by the original number
830 - 888 = -58
-58 ÷ 888 = -0.06531531531531531
-0.06531531531531531 x 100 = -6.53%