6.44% is the change from 606 to 645
Calculation steps:
[( 645 - 606 ) ÷ 606] x 100 = 6.44%
Formula
Percentage change = [(645 - 606) / 606] x 100
Subtract the new number by the original number
645 - 606 = 39
39 ÷ 606 = 0.06435643564356436
0.06435643564356436 x 100 = 6.44%