-15.8% is the change from 791 to 666
Calculation steps:
[( 666 - 791 ) ÷ 791] x 100 = -15.8%
Formula
Percentage change = [(666 - 791) / 791] x 100
Subtract the new number by the original number
666 - 791 = -125
-125 ÷ 791 = -0.15802781289506954
-0.15802781289506954 x 100 = -15.8%