-0.62% is the change from 647 to 643
Calculation steps:
[( 643 - 647 ) ÷ 647] x 100 = -0.62%
Formula
Percentage change = [(643 - 647) / 647] x 100
Subtract the new number by the original number
643 - 647 = -4
-4 ÷ 647 = -0.0061823802163833074
-0.0061823802163833074 x 100 = -0.62%