-34.03% is the change from 523 to 345
Calculation steps:
[( 345 - 523 ) ÷ 523] x 100 = -34.03%
Formula
Percentage change = [(345 - 523) / 523] x 100
Subtract the new number by the original number
345 - 523 = -178
-178 ÷ 523 = -0.3403441682600382
-0.3403441682600382 x 100 = -34.03%