-17.65% is the change from 810 to 667
Calculation steps:
[( 667 - 810 ) ÷ 810] x 100 = -17.65%
Formula
Percentage change = [(667 - 810) / 810] x 100
Subtract the new number by the original number
667 - 810 = -143
-143 ÷ 810 = -0.1765432098765432
-0.1765432098765432 x 100 = -17.65%