-92.66% is the change from 831 to 61
Calculation steps:
[( 61 - 831 ) ÷ 831] x 100 = -92.66%
Formula
Percentage change = [(61 - 831) / 831] x 100
Subtract the new number by the original number
61 - 831 = -770
-770 ÷ 831 = -0.9265944645006017
-0.9265944645006017 x 100 = -92.66%