-12.45% is the change from 819 to 717
Calculation steps:
[( 717 - 819 ) ÷ 819] x 100 = -12.45%
Formula
Percentage change = [(717 - 819) / 819] x 100
Subtract the new number by the original number
717 - 819 = -102
-102 ÷ 819 = -0.12454212454212454
-0.12454212454212454 x 100 = -12.45%