-98.15% is the change from 647 to 12
Calculation steps:
[( 12 - 647 ) ÷ 647] x 100 = -98.15%
Formula
Percentage change = [(12 - 647) / 647] x 100
Subtract the new number by the original number
12 - 647 = -635
-635 ÷ 647 = -0.98145285935085
-0.98145285935085 x 100 = -98.15%