-3.18% is the change from 817 to 791
Calculation steps:
[( 791 - 817 ) ÷ 817] x 100 = -3.18%
Formula
Percentage change = [(791 - 817) / 817] x 100
Subtract the new number by the original number
791 - 817 = -26
-26 ÷ 817 = -0.03182374541003672
-0.03182374541003672 x 100 = -3.18%