-10.49% is the change from 820 to 734
Calculation steps:
[( 734 - 820 ) ÷ 820] x 100 = -10.49%
Formula
Percentage change = [(734 - 820) / 820] x 100
Subtract the new number by the original number
734 - 820 = -86
-86 ÷ 820 = -0.1048780487804878
-0.1048780487804878 x 100 = -10.49%