7.9% is the change from 620 to 669
Calculation steps:
[( 669 - 620 ) ÷ 620] x 100 = 7.9%
Formula
Percentage change = [(669 - 620) / 620] x 100
Subtract the new number by the original number
669 - 620 = 49
49 ÷ 620 = 0.07903225806451612
0.07903225806451612 x 100 = 7.9%