-32.63% is the change from 800 to 539
Calculation steps:
[( 539 - 800 ) ÷ 800] x 100 = -32.63%
Formula
Percentage change = [(539 - 800) / 800] x 100
Subtract the new number by the original number
539 - 800 = -261
-261 ÷ 800 = -0.32625
-0.32625 x 100 = -32.63%