-98.23% is the change from 623 to 11
Calculation steps:
[( 11 - 623 ) ÷ 623] x 100 = -98.23%
Formula
Percentage change = [(11 - 623) / 623] x 100
Subtract the new number by the original number
11 - 623 = -612
-612 ÷ 623 = -0.9823434991974318
-0.9823434991974318 x 100 = -98.23%