-93.61% is the change from 830 to 53
Calculation steps:
[( 53 - 830 ) ÷ 830] x 100 = -93.61%
Formula
Percentage change = [(53 - 830) / 830] x 100
Subtract the new number by the original number
53 - 830 = -777
-777 ÷ 830 = -0.936144578313253
-0.936144578313253 x 100 = -93.61%