15.83% is the change from 840 to 973
Calculation steps:
[( 973 - 840 ) ÷ 840] x 100 = 15.83%
Formula
Percentage change = [(973 - 840) / 840] x 100
Subtract the new number by the original number
973 - 840 = 133
133 ÷ 840 = 0.15833333333333333
0.15833333333333333 x 100 = 15.83%