-44.61% is the change from 919 to 509
Calculation steps:
[( 509 - 919 ) ÷ 919] x 100 = -44.61%
Formula
Percentage change = [(509 - 919) / 919] x 100
Subtract the new number by the original number
509 - 919 = -410
-410 ÷ 919 = -0.44613710554951036
-0.44613710554951036 x 100 = -44.61%