-38.39% is the change from 508 to 313
Calculation steps:
[( 313 - 508 ) ÷ 508] x 100 = -38.39%
Formula
Percentage change = [(313 - 508) / 508] x 100
Subtract the new number by the original number
313 - 508 = -195
-195 ÷ 508 = -0.3838582677165354
-0.3838582677165354 x 100 = -38.39%