-97.04% is the change from 810 to 24
Calculation steps:
[( 24 - 810 ) ÷ 810] x 100 = -97.04%
Formula
Percentage change = [(24 - 810) / 810] x 100
Subtract the new number by the original number
24 - 810 = -786
-786 ÷ 810 = -0.9703703703703703
-0.9703703703703703 x 100 = -97.04%