305.43% is the change from 129 to 523
Calculation steps:
[( 523 - 129 ) ÷ 129] x 100 = 305.43%
Formula
Percentage change = [(523 - 129) / 129] x 100
Subtract the new number by the original number
523 - 129 = 394
394 ÷ 129 = 3.054263565891473
3.054263565891473 x 100 = 305.43%