8.45% is the change from 840 to 911
Calculation steps:
[( 911 - 840 ) ÷ 840] x 100 = 8.45%
Formula
Percentage change = [(911 - 840) / 840] x 100
Subtract the new number by the original number
911 - 840 = 71
71 ÷ 840 = 0.08452380952380953
0.08452380952380953 x 100 = 8.45%