343.45% is the change from 145 to 643
Calculation steps:
[( 643 - 145 ) ÷ 145] x 100 = 343.45%
Formula
Percentage change = [(643 - 145) / 145] x 100
Subtract the new number by the original number
643 - 145 = 498
498 ÷ 145 = 3.43448275862069
3.43448275862069 x 100 = 343.45%