-3.49% is the change from 831 to 802
Calculation steps:
[( 802 - 831 ) ÷ 831] x 100 = -3.49%
Formula
Percentage change = [(802 - 831) / 831] x 100
Subtract the new number by the original number
802 - 831 = -29
-29 ÷ 831 = -0.03489771359807461
-0.03489771359807461 x 100 = -3.49%