-18.27% is the change from 810 to 662
Calculation steps:
[( 662 - 810 ) ÷ 810] x 100 = -18.27%
Formula
Percentage change = [(662 - 810) / 810] x 100
Subtract the new number by the original number
662 - 810 = -148
-148 ÷ 810 = -0.18271604938271604
-0.18271604938271604 x 100 = -18.27%