-12.37% is the change from 930 to 815
Calculation steps:
[( 815 - 930 ) ÷ 930] x 100 = -12.37%
Formula
Percentage change = [(815 - 930) / 930] x 100
Subtract the new number by the original number
815 - 930 = -115
-115 ÷ 930 = -0.12365591397849462
-0.12365591397849462 x 100 = -12.37%