-67.19% is the change from 509 to 167
Calculation steps:
[( 167 - 509 ) ÷ 509] x 100 = -67.19%
Formula
Percentage change = [(167 - 509) / 509] x 100
Subtract the new number by the original number
167 - 509 = -342
-342 ÷ 509 = -0.6719056974459725
-0.6719056974459725 x 100 = -67.19%