-99.54% is the change from 647 to 3
Calculation steps:
[( 3 - 647 ) ÷ 647] x 100 = -99.54%
Formula
Percentage change = [(3 - 647) / 647] x 100
Subtract the new number by the original number
3 - 647 = -644
-644 ÷ 647 = -0.9953632148377125
-0.9953632148377125 x 100 = -99.54%