-37.2% is the change from 508 to 319
Calculation steps:
[( 319 - 508 ) ÷ 508] x 100 = -37.2%
Formula
Percentage change = [(319 - 508) / 508] x 100
Subtract the new number by the original number
319 - 508 = -189
-189 ÷ 508 = -0.3720472440944882
-0.3720472440944882 x 100 = -37.2%