-3.79% is the change from 817 to 786
Calculation steps:
[( 786 - 817 ) ÷ 817] x 100 = -3.79%
Formula
Percentage change = [(786 - 817) / 817] x 100
Subtract the new number by the original number
786 - 817 = -31
-31 ÷ 817 = -0.037943696450428395
-0.037943696450428395 x 100 = -3.79%