5% is the change from 620 to 651
Calculation steps:
[( 651 - 620 ) ÷ 620] x 100 = 5%
Formula
Percentage change = [(651 - 620) / 620] x 100
Subtract the new number by the original number
651 - 620 = 31
31 ÷ 620 = 0.05
0.05 x 100 = 5%
Example