-4.33% is the change from 647 to 619
Calculation steps:
[( 619 - 647 ) ÷ 647] x 100 = -4.33%
Formula
Percentage change = [(619 - 647) / 647] x 100
Subtract the new number by the original number
619 - 647 = -28
-28 ÷ 647 = -0.04327666151468315
-0.04327666151468315 x 100 = -4.33%