502.8% is the change from 107 to 645
Calculation steps:
[( 645 - 107 ) ÷ 107] x 100 = 502.8%
Formula
Percentage change = [(645 - 107) / 107] x 100
Subtract the new number by the original number
645 - 107 = 538
538 ÷ 107 = 5.02803738317757
5.02803738317757 x 100 = 502.8%