-31.83% is the change from 509 to 347
Calculation steps:
[( 347 - 509 ) ÷ 509] x 100 = -31.83%
Formula
Percentage change = [(347 - 509) / 509] x 100
Subtract the new number by the original number
347 - 509 = -162
-162 ÷ 509 = -0.3182711198428291
-0.3182711198428291 x 100 = -31.83%