4.2% is the change from 619 to 645
Calculation steps:
[( 645 - 619 ) ÷ 619] x 100 = 4.2%
Formula
Percentage change = [(645 - 619) / 619] x 100
Subtract the new number by the original number
645 - 619 = 26
26 ÷ 619 = 0.0420032310177706
0.0420032310177706 x 100 = 4.2%