1.1% is the change from 636 to 643
Calculation steps:
[( 643 - 636 ) ÷ 636] x 100 = 1.1%
Formula
Percentage change = [(643 - 636) / 636] x 100
Subtract the new number by the original number
643 - 636 = 7
7 ÷ 636 = 0.0110062893081761
0.0110062893081761 x 100 = 1.1%