-93.42% is the change from 517 to 34
Calculation steps:
[( 34 - 517 ) ÷ 517] x 100 = -93.42%
Formula
Percentage change = [(34 - 517) / 517] x 100
Subtract the new number by the original number
34 - 517 = -483
-483 ÷ 517 = -0.9342359767891683
-0.9342359767891683 x 100 = -93.42%