-11.98% is the change from 643 to 566
Calculation steps:
[( 566 - 643 ) ÷ 643] x 100 = -11.98%
Formula
Percentage change = [(566 - 643) / 643] x 100
Subtract the new number by the original number
566 - 643 = -77
-77 ÷ 643 = -0.11975116640746501
-0.11975116640746501 x 100 = -11.98%