97.7% is the change from 391 to 773
Calculation steps:
[( 773 - 391 ) ÷ 391] x 100 = 97.7%
Formula
Percentage change = [(773 - 391) / 391] x 100
Subtract the new number by the original number
773 - 391 = 382
382 ÷ 391 = 0.9769820971867008
0.9769820971867008 x 100 = 97.7%