-66.07% is the change from 507 to 172
Calculation steps:
[( 172 - 507 ) ÷ 507] x 100 = -66.07%
Formula
Percentage change = [(172 - 507) / 507] x 100
Subtract the new number by the original number
172 - 507 = -335
-335 ÷ 507 = -0.6607495069033531
-0.6607495069033531 x 100 = -66.07%