-92.52% is the change from 815 to 61
Calculation steps:
[( 61 - 815 ) ÷ 815] x 100 = -92.52%
Formula
Percentage change = [(61 - 815) / 815] x 100
Subtract the new number by the original number
61 - 815 = -754
-754 ÷ 815 = -0.9251533742331288
-0.9251533742331288 x 100 = -92.52%