-3.68% is the change from 816 to 786
Calculation steps:
[( 786 - 816 ) ÷ 816] x 100 = -3.68%
Formula
Percentage change = [(786 - 816) / 816] x 100
Subtract the new number by the original number
786 - 816 = -30
-30 ÷ 816 = -0.03676470588235294
-0.03676470588235294 x 100 = -3.68%