-11.61% is the change from 646 to 571
Calculation steps:
[( 571 - 646 ) ÷ 646] x 100 = -11.61%
Formula
Percentage change = [(571 - 646) / 646] x 100
Subtract the new number by the original number
571 - 646 = -75
-75 ÷ 646 = -0.11609907120743033
-0.11609907120743033 x 100 = -11.61%