-33.14% is the change from 507 to 339
Calculation steps:
[( 339 - 507 ) ÷ 507] x 100 = -33.14%
Formula
Percentage change = [(339 - 507) / 507] x 100
Subtract the new number by the original number
339 - 507 = -168
-168 ÷ 507 = -0.33136094674556216
-0.33136094674556216 x 100 = -33.14%