7.78% is the change from 668 to 720
Calculation steps:
[( 720 - 668 ) ÷ 668] x 100 = 7.78%
Formula
Percentage change = [(720 - 668) / 668] x 100
Subtract the new number by the original number
720 - 668 = 52
52 ÷ 668 = 0.07784431137724551
0.07784431137724551 x 100 = 7.78%