-98.49% is the change from 663 to 10
Calculation steps:
[( 10 - 663 ) ÷ 663] x 100 = -98.49%
Formula
Percentage change = [(10 - 663) / 663] x 100
Subtract the new number by the original number
10 - 663 = -653
-653 ÷ 663 = -0.9849170437405732
-0.9849170437405732 x 100 = -98.49%