12.42% is the change from 821 to 923
Calculation steps:
[( 923 - 821 ) ÷ 821] x 100 = 12.42%
Formula
Percentage change = [(923 - 821) / 821] x 100
Subtract the new number by the original number
923 - 821 = 102
102 ÷ 821 = 0.12423873325213154
0.12423873325213154 x 100 = 12.42%