-37.08% is the change from 507 to 319
Calculation steps:
[( 319 - 507 ) ÷ 507] x 100 = -37.08%
Formula
Percentage change = [(319 - 507) / 507] x 100
Subtract the new number by the original number
319 - 507 = -188
-188 ÷ 507 = -0.3708086785009862
-0.3708086785009862 x 100 = -37.08%