-94.52% is the change from 621 to 34
Calculation steps:
[( 34 - 621 ) ÷ 621] x 100 = -94.52%
Formula
Percentage change = [(34 - 621) / 621] x 100
Subtract the new number by the original number
34 - 621 = -587
-587 ÷ 621 = -0.9452495974235104
-0.9452495974235104 x 100 = -94.52%