-96.3% is the change from 648 to 24
Calculation steps:
[( 24 - 648 ) ÷ 648] x 100 = -96.3%
Formula
Percentage change = [(24 - 648) / 648] x 100
Subtract the new number by the original number
24 - 648 = -624
-624 ÷ 648 = -0.9629629629629629
-0.9629629629629629 x 100 = -96.3%