17.76% is the change from 777 to 915
Calculation steps:
[( 915 - 777 ) ÷ 777] x 100 = 17.76%
Formula
Percentage change = [(915 - 777) / 777] x 100
Subtract the new number by the original number
915 - 777 = 138
138 ÷ 777 = 0.1776061776061776
0.1776061776061776 x 100 = 17.76%