-16.57% is the change from 507 to 423
Calculation steps:
[( 423 - 507 ) ÷ 507] x 100 = -16.57%
Formula
Percentage change = [(423 - 507) / 507] x 100
Subtract the new number by the original number
423 - 507 = -84
-84 ÷ 507 = -0.16568047337278108
-0.16568047337278108 x 100 = -16.57%