9.25% is the change from 843 to 921
Calculation steps:
[( 921 - 843 ) ÷ 843] x 100 = 9.25%
Formula
Percentage change = [(921 - 843) / 843] x 100
Subtract the new number by the original number
921 - 843 = 78
78 ÷ 843 = 0.09252669039145907
0.09252669039145907 x 100 = 9.25%