1.9% is the change from 633 to 645
Calculation steps:
[( 645 - 633 ) ÷ 633] x 100 = 1.9%
Formula
Percentage change = [(645 - 633) / 633] x 100
Subtract the new number by the original number
645 - 633 = 12
12 ÷ 633 = 0.018957345971563982
0.018957345971563982 x 100 = 1.9%