-33.9% is the change from 817 to 540
Calculation steps:
[( 540 - 817 ) ÷ 817] x 100 = -33.9%
Formula
Percentage change = [(540 - 817) / 817] x 100
Subtract the new number by the original number
540 - 817 = -277
-277 ÷ 817 = -0.3390452876376989
-0.3390452876376989 x 100 = -33.9%