-67.18% is the change from 518 to 170
Calculation steps:
[( 170 - 518 ) ÷ 518] x 100 = -67.18%
Formula
Percentage change = [(170 - 518) / 518] x 100
Subtract the new number by the original number
170 - 518 = -348
-348 ÷ 518 = -0.6718146718146718
-0.6718146718146718 x 100 = -67.18%