-9.03% is the change from 831 to 756
Calculation steps:
[( 756 - 831 ) ÷ 831] x 100 = -9.03%
Formula
Percentage change = [(756 - 831) / 831] x 100
Subtract the new number by the original number
756 - 831 = -75
-75 ÷ 831 = -0.09025270758122744
-0.09025270758122744 x 100 = -9.03%