306.9% is the change from 145 to 590
Calculation steps:
[( 590 - 145 ) ÷ 145] x 100 = 306.9%
Formula
Percentage change = [(590 - 145) / 145] x 100
Subtract the new number by the original number
590 - 145 = 445
445 ÷ 145 = 3.0689655172413794
3.0689655172413794 x 100 = 306.9%