-33.95% is the change from 816 to 539
Calculation steps:
[( 539 - 816 ) ÷ 816] x 100 = -33.95%
Formula
Percentage change = [(539 - 816) / 816] x 100
Subtract the new number by the original number
539 - 816 = -277
-277 ÷ 816 = -0.3394607843137255
-0.3394607843137255 x 100 = -33.95%