-99.72% is the change from 721 to 2
Calculation steps:
[( 2 - 721 ) ÷ 721] x 100 = -99.72%
Formula
Percentage change = [(2 - 721) / 721] x 100
Subtract the new number by the original number
2 - 721 = -719
-719 ÷ 721 = -0.9972260748959778
-0.9972260748959778 x 100 = -99.72%