-98.29% is the change from 643 to 11
Calculation steps:
[( 11 - 643 ) ÷ 643] x 100 = -98.29%
Formula
Percentage change = [(11 - 643) / 643] x 100
Subtract the new number by the original number
11 - 643 = -632
-632 ÷ 643 = -0.9828926905132193
-0.9828926905132193 x 100 = -98.29%