-6.74% is the change from 890 to 830
Calculation steps:
[( 830 - 890 ) ÷ 890] x 100 = -6.74%
Formula
Percentage change = [(830 - 890) / 890] x 100
Subtract the new number by the original number
830 - 890 = -60
-60 ÷ 890 = -0.06741573033707865
-0.06741573033707865 x 100 = -6.74%