2.97% is the change from 639 to 658
Calculation steps:
[( 658 - 639 ) ÷ 639] x 100 = 2.97%
Formula
Percentage change = [(658 - 639) / 639] x 100
Subtract the new number by the original number
658 - 639 = 19
19 ÷ 639 = 0.0297339593114241
0.0297339593114241 x 100 = 2.97%