-52.26% is the change from 509 to 243
Calculation steps:
[( 243 - 509 ) ÷ 509] x 100 = -52.26%
Formula
Percentage change = [(243 - 509) / 509] x 100
Subtract the new number by the original number
243 - 509 = -266
-266 ÷ 509 = -0.5225933202357563
-0.5225933202357563 x 100 = -52.26%