12.73% is the change from 817 to 921
Calculation steps:
[( 921 - 817 ) ÷ 817] x 100 = 12.73%
Formula
Percentage change = [(921 - 817) / 817] x 100
Subtract the new number by the original number
921 - 817 = 104
104 ÷ 817 = 0.12729498164014688
0.12729498164014688 x 100 = 12.73%