-49.91% is the change from 539 to 270
Calculation steps:
[( 270 - 539 ) ÷ 539] x 100 = -49.91%
Formula
Percentage change = [(270 - 539) / 539] x 100
Subtract the new number by the original number
270 - 539 = -269
-269 ÷ 539 = -0.49907235621521334
-0.49907235621521334 x 100 = -49.91%