-16.58% is the change from 796 to 664
Calculation steps:
[( 664 - 796 ) ÷ 796] x 100 = -16.58%
Formula
Percentage change = [(664 - 796) / 796] x 100
Subtract the new number by the original number
664 - 796 = -132
-132 ÷ 796 = -0.1658291457286432
-0.1658291457286432 x 100 = -16.58%