15.83% is the change from 777 to 900
Calculation steps:
[( 900 - 777 ) ÷ 777] x 100 = 15.83%
Formula
Percentage change = [(900 - 777) / 777] x 100
Subtract the new number by the original number
900 - 777 = 123
123 ÷ 777 = 0.1583011583011583
0.1583011583011583 x 100 = 15.83%