12.87% is the change from 816 to 921
Calculation steps:
[( 921 - 816 ) ÷ 816] x 100 = 12.87%
Formula
Percentage change = [(921 - 816) / 816] x 100
Subtract the new number by the original number
921 - 816 = 105
105 ÷ 816 = 0.12867647058823528
0.12867647058823528 x 100 = 12.87%