10.71% is the change from 840 to 930
Calculation steps:
[( 930 - 840 ) ÷ 840] x 100 = 10.71%
Formula
Percentage change = [(930 - 840) / 840] x 100
Subtract the new number by the original number
930 - 840 = 90
90 ÷ 840 = 0.10714285714285714
0.10714285714285714 x 100 = 10.71%