-99.86% is the change from 721 to 1
Calculation steps:
[( 1 - 721 ) ÷ 721] x 100 = -99.86%
Formula
Percentage change = [(1 - 721) / 721] x 100
Subtract the new number by the original number
1 - 721 = -720
-720 ÷ 721 = -0.9986130374479889
-0.9986130374479889 x 100 = -99.86%