-36.58% is the change from 503 to 319
Calculation steps:
[( 319 - 503 ) ÷ 503] x 100 = -36.58%
Formula
Percentage change = [(319 - 503) / 503] x 100
Subtract the new number by the original number
319 - 503 = -184
-184 ÷ 503 = -0.3658051689860835
-0.3658051689860835 x 100 = -36.58%