-27.93% is the change from 999 to 720
Calculation steps:
[( 720 - 999 ) ÷ 999] x 100 = -27.93%
Formula
Percentage change = [(720 - 999) / 999] x 100
Subtract the new number by the original number
720 - 999 = -279
-279 ÷ 999 = -0.27927927927927926
-0.27927927927927926 x 100 = -27.93%