-98.44% is the change from 643 to 10
Calculation steps:
[( 10 - 643 ) ÷ 643] x 100 = -98.44%
Formula
Percentage change = [(10 - 643) / 643] x 100
Subtract the new number by the original number
10 - 643 = -633
-633 ÷ 643 = -0.9844479004665629
-0.9844479004665629 x 100 = -98.44%