-10.38% is the change from 800 to 717
Calculation steps:
[( 717 - 800 ) ÷ 800] x 100 = -10.38%
Formula
Percentage change = [(717 - 800) / 800] x 100
Subtract the new number by the original number
717 - 800 = -83
-83 ÷ 800 = -0.10375
-0.10375 x 100 = -10.38%