-33.85% is the change from 517 to 342
Calculation steps:
[( 342 - 517 ) ÷ 517] x 100 = -33.85%
Formula
Percentage change = [(342 - 517) / 517] x 100
Subtract the new number by the original number
342 - 517 = -175
-175 ÷ 517 = -0.33849129593810445
-0.33849129593810445 x 100 = -33.85%