-98.3% is the change from 647 to 11
Calculation steps:
[( 11 - 647 ) ÷ 647] x 100 = -98.3%
Formula
Percentage change = [(11 - 647) / 647] x 100
Subtract the new number by the original number
11 - 647 = -636
-636 ÷ 647 = -0.9829984544049459
-0.9829984544049459 x 100 = -98.3%