-37.8% is the change from 508 to 316
Calculation steps:
[( 316 - 508 ) ÷ 508] x 100 = -37.8%
Formula
Percentage change = [(316 - 508) / 508] x 100
Subtract the new number by the original number
316 - 508 = -192
-192 ÷ 508 = -0.3779527559055118
-0.3779527559055118 x 100 = -37.8%