-18.36% is the change from 817 to 667
Calculation steps:
[( 667 - 817 ) ÷ 817] x 100 = -18.36%
Formula
Percentage change = [(667 - 817) / 817] x 100
Subtract the new number by the original number
667 - 817 = -150
-150 ÷ 817 = -0.1835985312117503
-0.1835985312117503 x 100 = -18.36%