-98.31% is the change from 649 to 11
Calculation steps:
[( 11 - 649 ) ÷ 649] x 100 = -98.31%
Formula
Percentage change = [(11 - 649) / 649] x 100
Subtract the new number by the original number
11 - 649 = -638
-638 ÷ 649 = -0.9830508474576272
-0.9830508474576272 x 100 = -98.31%