-16.19% is the change from 797 to 668
Calculation steps:
[( 668 - 797 ) ÷ 797] x 100 = -16.19%
Formula
Percentage change = [(668 - 797) / 797] x 100
Subtract the new number by the original number
668 - 797 = -129
-129 ÷ 797 = -0.1618569636135508
-0.1618569636135508 x 100 = -16.19%