-27.96% is the change from 930 to 670
Calculation steps:
[( 670 - 930 ) ÷ 930] x 100 = -27.96%
Formula
Percentage change = [(670 - 930) / 930] x 100
Subtract the new number by the original number
670 - 930 = -260
-260 ÷ 930 = -0.27956989247311825
-0.27956989247311825 x 100 = -27.96%