-44.25% is the change from 913 to 509
Calculation steps:
[( 509 - 913 ) ÷ 913] x 100 = -44.25%
Formula
Percentage change = [(509 - 913) / 913] x 100
Subtract the new number by the original number
509 - 913 = -404
-404 ÷ 913 = -0.4424972617743702
-0.4424972617743702 x 100 = -44.25%