6.8% is the change from 721 to 770
Calculation steps:
[( 770 - 721 ) ÷ 721] x 100 = 6.8%
Formula
Percentage change = [(770 - 721) / 721] x 100
Subtract the new number by the original number
770 - 721 = 49
49 ÷ 721 = 0.06796116504854369
0.06796116504854369 x 100 = 6.8%