-28.91% is the change from 934 to 664
Calculation steps:
[( 664 - 934 ) ÷ 934] x 100 = -28.91%
Formula
Percentage change = [(664 - 934) / 934] x 100
Subtract the new number by the original number
664 - 934 = -270
-270 ÷ 934 = -0.2890792291220557
-0.2890792291220557 x 100 = -28.91%