-35.49% is the change from 479 to 309
Calculation steps:
[( 309 - 479 ) ÷ 479] x 100 = -35.49%
Formula
Percentage change = [(309 - 479) / 479] x 100
Subtract the new number by the original number
309 - 479 = -170
-170 ÷ 479 = -0.35490605427974947
-0.35490605427974947 x 100 = -35.49%