-66.27% is the change from 510 to 172
Calculation steps:
[( 172 - 510 ) ÷ 510] x 100 = -66.27%
Formula
Percentage change = [(172 - 510) / 510] x 100
Subtract the new number by the original number
172 - 510 = -338
-338 ÷ 510 = -0.6627450980392157
-0.6627450980392157 x 100 = -66.27%