-41.09% is the change from 915 to 539
Calculation steps:
[( 539 - 915 ) ÷ 915] x 100 = -41.09%
Formula
Percentage change = [(539 - 915) / 915] x 100
Subtract the new number by the original number
539 - 915 = -376
-376 ÷ 915 = -0.41092896174863386
-0.41092896174863386 x 100 = -41.09%