1.31% is the change from 612 to 620
Calculation steps:
[( 620 - 612 ) ÷ 612] x 100 = 1.31%
Formula
Percentage change = [(620 - 612) / 612] x 100
Subtract the new number by the original number
620 - 612 = 8
8 ÷ 612 = 0.013071895424836602
0.013071895424836602 x 100 = 1.31%