-33.66% is the change from 517 to 343
Calculation steps:
[( 343 - 517 ) ÷ 517] x 100 = -33.66%
Formula
Percentage change = [(343 - 517) / 517] x 100
Subtract the new number by the original number
343 - 517 = -174
-174 ÷ 517 = -0.3365570599613153
-0.3365570599613153 x 100 = -33.66%