1.09% is the change from 921 to 931
Calculation steps:
[( 931 - 921 ) ÷ 921] x 100 = 1.09%
Formula
Percentage change = [(931 - 921) / 921] x 100
Subtract the new number by the original number
931 - 921 = 10
10 ÷ 921 = 0.010857763300760043
0.010857763300760043 x 100 = 1.09%