-0.47% is the change from 644 to 641
Calculation steps:
[( 641 - 644 ) ÷ 644] x 100 = -0.47%
Formula
Percentage change = [(641 - 644) / 644] x 100
Subtract the new number by the original number
641 - 644 = -3
-3 ÷ 644 = -0.004658385093167702
-0.004658385093167702 x 100 = -0.47%