-50.65% is the change from 539 to 266
Calculation steps:
[( 266 - 539 ) ÷ 539] x 100 = -50.65%
Formula
Percentage change = [(266 - 539) / 539] x 100
Subtract the new number by the original number
266 - 539 = -273
-273 ÷ 539 = -0.5064935064935064
-0.5064935064935064 x 100 = -50.65%