-3.08% is the change from 813 to 788
Calculation steps:
[( 788 - 813 ) ÷ 813] x 100 = -3.08%
Formula
Percentage change = [(788 - 813) / 813] x 100
Subtract the new number by the original number
788 - 813 = -25
-25 ÷ 813 = -0.03075030750307503
-0.03075030750307503 x 100 = -3.08%