-33.95% is the change from 810 to 535
Calculation steps:
[( 535 - 810 ) ÷ 810] x 100 = -33.95%
Formula
Percentage change = [(535 - 810) / 810] x 100
Subtract the new number by the original number
535 - 810 = -275
-275 ÷ 810 = -0.3395061728395062
-0.3395061728395062 x 100 = -33.95%