-29.89% is the change from 455 to 319
Calculation steps:
[( 319 - 455 ) ÷ 455] x 100 = -29.89%
Formula
Percentage change = [(319 - 455) / 455] x 100
Subtract the new number by the original number
319 - 455 = -136
-136 ÷ 455 = -0.2989010989010989
-0.2989010989010989 x 100 = -29.89%