-82.35% is the change from 810 to 143
Calculation steps:
[( 143 - 810 ) ÷ 810] x 100 = -82.35%
Formula
Percentage change = [(143 - 810) / 810] x 100
Subtract the new number by the original number
143 - 810 = -667
-667 ÷ 810 = -0.8234567901234567
-0.8234567901234567 x 100 = -82.35%