527.27% is the change from 55 to 345
Calculation steps:
[( 345 - 55 ) ÷ 55] x 100 = 527.27%
Formula
Percentage change = [(345 - 55) / 55] x 100
Subtract the new number by the original number
345 - 55 = 290
290 ÷ 55 = 5.2727272727272725
5.2727272727272725 x 100 = 527.27%