-93.73% is the change from 830 to 52
Calculation steps:
[( 52 - 830 ) ÷ 830] x 100 = -93.73%
Formula
Percentage change = [(52 - 830) / 830] x 100
Subtract the new number by the original number
52 - 830 = -778
-778 ÷ 830 = -0.9373493975903614
-0.9373493975903614 x 100 = -93.73%