-98.07% is the change from 621 to 12
Calculation steps:
[( 12 - 621 ) ÷ 621] x 100 = -98.07%
Formula
Percentage change = [(12 - 621) / 621] x 100
Subtract the new number by the original number
12 - 621 = -609
-609 ÷ 621 = -0.9806763285024155
-0.9806763285024155 x 100 = -98.07%