-45.25% is the change from 915 to 501
Calculation steps:
[( 501 - 915 ) ÷ 915] x 100 = -45.25%
Formula
Percentage change = [(501 - 915) / 915] x 100
Subtract the new number by the original number
501 - 915 = -414
-414 ÷ 915 = -0.4524590163934426
-0.4524590163934426 x 100 = -45.25%