-98.87% is the change from 621 to 7
Calculation steps:
[( 7 - 621 ) ÷ 621] x 100 = -98.87%
Formula
Percentage change = [(7 - 621) / 621] x 100
Subtract the new number by the original number
7 - 621 = -614
-614 ÷ 621 = -0.9887278582930756
-0.9887278582930756 x 100 = -98.87%