-92.42% is the change from 831 to 63
Calculation steps:
[( 63 - 831 ) ÷ 831] x 100 = -92.42%
Formula
Percentage change = [(63 - 831) / 831] x 100
Subtract the new number by the original number
63 - 831 = -768
-768 ÷ 831 = -0.924187725631769
-0.924187725631769 x 100 = -92.42%