-96.23% is the change from 636 to 24
Calculation steps:
[( 24 - 636 ) ÷ 636] x 100 = -96.23%
Formula
Percentage change = [(24 - 636) / 636] x 100
Subtract the new number by the original number
24 - 636 = -612
-612 ÷ 636 = -0.9622641509433962
-0.9622641509433962 x 100 = -96.23%