-35.26% is the change from 831 to 538
Calculation steps:
[( 538 - 831 ) ÷ 831] x 100 = -35.26%
Formula
Percentage change = [(538 - 831) / 831] x 100
Subtract the new number by the original number
538 - 831 = -293
-293 ÷ 831 = -0.3525872442839952
-0.3525872442839952 x 100 = -35.26%