-20.91% is the change from 507 to 401
Calculation steps:
[( 401 - 507 ) ÷ 507] x 100 = -20.91%
Formula
Percentage change = [(401 - 507) / 507] x 100
Subtract the new number by the original number
401 - 507 = -106
-106 ÷ 507 = -0.20907297830374755
-0.20907297830374755 x 100 = -20.91%