-4.79% is the change from 647 to 616
Calculation steps:
[( 616 - 647 ) ÷ 647] x 100 = -4.79%
Formula
Percentage change = [(616 - 647) / 647] x 100
Subtract the new number by the original number
616 - 647 = -31
-31 ÷ 647 = -0.04791344667697063
-0.04791344667697063 x 100 = -4.79%