-3.25% is the change from 830 to 803
Calculation steps:
[( 803 - 830 ) ÷ 830] x 100 = -3.25%
Formula
Percentage change = [(803 - 830) / 830] x 100
Subtract the new number by the original number
803 - 830 = -27
-27 ÷ 830 = -0.03253012048192771
-0.03253012048192771 x 100 = -3.25%