-16.19% is the change from 840 to 704
Calculation steps:
[( 704 - 840 ) ÷ 840] x 100 = -16.19%
Formula
Percentage change = [(704 - 840) / 840] x 100
Subtract the new number by the original number
704 - 840 = -136
-136 ÷ 840 = -0.1619047619047619
-0.1619047619047619 x 100 = -16.19%