-26.47% is the change from 831 to 611
Calculation steps:
[( 611 - 831 ) ÷ 831] x 100 = -26.47%
Formula
Percentage change = [(611 - 831) / 831] x 100
Subtract the new number by the original number
611 - 831 = -220
-220 ÷ 831 = -0.2647412755716005
-0.2647412755716005 x 100 = -26.47%