-37.87% is the change from 507 to 315
Calculation steps:
[( 315 - 507 ) ÷ 507] x 100 = -37.87%
Formula
Percentage change = [(315 - 507) / 507] x 100
Subtract the new number by the original number
315 - 507 = -192
-192 ÷ 507 = -0.378698224852071
-0.378698224852071 x 100 = -37.87%