-33.4% is the change from 479 to 319
Calculation steps:
[( 319 - 479 ) ÷ 479] x 100 = -33.4%
Formula
Percentage change = [(319 - 479) / 479] x 100
Subtract the new number by the original number
319 - 479 = -160
-160 ÷ 479 = -0.33402922755741127
-0.33402922755741127 x 100 = -33.4%