-20% is the change from 910 to 728
Calculation steps:
[( 728 - 910 ) ÷ 910] x 100 = -20%
Formula
Percentage change = [(728 - 910) / 910] x 100
Subtract the new number by the original number
728 - 910 = -182
-182 ÷ 910 = -0.2
-0.2 x 100 = -20%
Example