-84.38% is the change from 621 to 97
Calculation steps:
[( 97 - 621 ) ÷ 621] x 100 = -84.38%
Formula
Percentage change = [(97 - 621) / 621] x 100
Subtract the new number by the original number
97 - 621 = -524
-524 ÷ 621 = -0.8438003220611916
-0.8438003220611916 x 100 = -84.38%