71.88% is the change from 448 to 770
Calculation steps:
[( 770 - 448 ) ÷ 448] x 100 = 71.88%
Formula
Percentage change = [(770 - 448) / 448] x 100
Subtract the new number by the original number
770 - 448 = 322
322 ÷ 448 = 0.71875
0.71875 x 100 = 71.88%