316.13% is the change from 155 to 645
Calculation steps:
[( 645 - 155 ) ÷ 155] x 100 = 316.13%
Formula
Percentage change = [(645 - 155) / 155] x 100
Subtract the new number by the original number
645 - 155 = 490
490 ÷ 155 = 3.161290322580645
3.161290322580645 x 100 = 316.13%