-97.53% is the change from 647 to 16
Calculation steps:
[( 16 - 647 ) ÷ 647] x 100 = -97.53%
Formula
Percentage change = [(16 - 647) / 647] x 100
Subtract the new number by the original number
16 - 647 = -631
-631 ÷ 647 = -0.9752704791344667
-0.9752704791344667 x 100 = -97.53%