1.09% is the change from 643 to 650
Calculation steps:
[( 650 - 643 ) ÷ 643] x 100 = 1.09%
Formula
Percentage change = [(650 - 643) / 643] x 100
Subtract the new number by the original number
650 - 643 = 7
7 ÷ 643 = 0.01088646967340591
0.01088646967340591 x 100 = 1.09%