19.32% is the change from 704 to 840
Calculation steps:
[( 840 - 704 ) ÷ 704] x 100 = 19.32%
Formula
Percentage change = [(840 - 704) / 704] x 100
Subtract the new number by the original number
840 - 704 = 136
136 ÷ 704 = 0.19318181818181818
0.19318181818181818 x 100 = 19.32%