39.93% is the change from 551 to 771
Calculation steps:
[( 771 - 551 ) ÷ 551] x 100 = 39.93%
Formula
Percentage change = [(771 - 551) / 551] x 100
Subtract the new number by the original number
771 - 551 = 220
220 ÷ 551 = 0.3992740471869328
0.3992740471869328 x 100 = 39.93%