-30.11% is the change from 817 to 571
Calculation steps:
[( 571 - 817 ) ÷ 817] x 100 = -30.11%
Formula
Percentage change = [(571 - 817) / 817] x 100
Subtract the new number by the original number
571 - 817 = -246
-246 ÷ 817 = -0.3011015911872705
-0.3011015911872705 x 100 = -30.11%