-8.23% is the change from 644 to 591
Calculation steps:
[( 591 - 644 ) ÷ 644] x 100 = -8.23%
Formula
Percentage change = [(591 - 644) / 644] x 100
Subtract the new number by the original number
591 - 644 = -53
-53 ÷ 644 = -0.08229813664596274
-0.08229813664596274 x 100 = -8.23%