-30.2% is the change from 818 to 571
Calculation steps:
[( 571 - 818 ) ÷ 818] x 100 = -30.2%
Formula
Percentage change = [(571 - 818) / 818] x 100
Subtract the new number by the original number
571 - 818 = -247
-247 ÷ 818 = -0.3019559902200489
-0.3019559902200489 x 100 = -30.2%