-92.56% is the change from 820 to 61
Calculation steps:
[( 61 - 820 ) ÷ 820] x 100 = -92.56%
Formula
Percentage change = [(61 - 820) / 820] x 100
Subtract the new number by the original number
61 - 820 = -759
-759 ÷ 820 = -0.925609756097561
-0.925609756097561 x 100 = -92.56%