-6.19% is the change from 840 to 788
Calculation steps:
[( 788 - 840 ) ÷ 840] x 100 = -6.19%
Formula
Percentage change = [(788 - 840) / 840] x 100
Subtract the new number by the original number
788 - 840 = -52
-52 ÷ 840 = -0.06190476190476191
-0.06190476190476191 x 100 = -6.19%