-64.3% is the change from 507 to 181
Calculation steps:
[( 181 - 507 ) ÷ 507] x 100 = -64.3%
Formula
Percentage change = [(181 - 507) / 507] x 100
Subtract the new number by the original number
181 - 507 = -326
-326 ÷ 507 = -0.6429980276134122
-0.6429980276134122 x 100 = -64.3%