-34.43% is the change from 517 to 339
Calculation steps:
[( 339 - 517 ) ÷ 517] x 100 = -34.43%
Formula
Percentage change = [(339 - 517) / 517] x 100
Subtract the new number by the original number
339 - 517 = -178
-178 ÷ 517 = -0.344294003868472
-0.344294003868472 x 100 = -34.43%