-93.62% is the change from 815 to 52
Calculation steps:
[( 52 - 815 ) ÷ 815] x 100 = -93.62%
Formula
Percentage change = [(52 - 815) / 815] x 100
Subtract the new number by the original number
52 - 815 = -763
-763 ÷ 815 = -0.9361963190184049
-0.9361963190184049 x 100 = -93.62%