-93.5% is the change from 815 to 53
Calculation steps:
[( 53 - 815 ) ÷ 815] x 100 = -93.5%
Formula
Percentage change = [(53 - 815) / 815] x 100
Subtract the new number by the original number
53 - 815 = -762
-762 ÷ 815 = -0.9349693251533743
-0.9349693251533743 x 100 = -93.5%