-45.36% is the change from 915 to 500
Calculation steps:
[( 500 - 915 ) ÷ 915] x 100 = -45.36%
Formula
Percentage change = [(500 - 915) / 915] x 100
Subtract the new number by the original number
500 - 915 = -415
-415 ÷ 915 = -0.453551912568306
-0.453551912568306 x 100 = -45.36%