6.77% is the change from 620 to 662
Calculation steps:
[( 662 - 620 ) ÷ 620] x 100 = 6.77%
Formula
Percentage change = [(662 - 620) / 620] x 100
Subtract the new number by the original number
662 - 620 = 42
42 ÷ 620 = 0.06774193548387097
0.06774193548387097 x 100 = 6.77%