-8.49% is the change from 930 to 851
Calculation steps:
[( 851 - 930 ) ÷ 930] x 100 = -8.49%
Formula
Percentage change = [(851 - 930) / 930] x 100
Subtract the new number by the original number
851 - 930 = -79
-79 ÷ 930 = -0.08494623655913978
-0.08494623655913978 x 100 = -8.49%