-8.85% is the change from 644 to 587
Calculation steps:
[( 587 - 644 ) ÷ 644] x 100 = -8.85%
Formula
Percentage change = [(587 - 644) / 644] x 100
Subtract the new number by the original number
587 - 644 = -57
-57 ÷ 644 = -0.08850931677018634
-0.08850931677018634 x 100 = -8.85%