-69.64% is the change from 728 to 221
Calculation steps:
[( 221 - 728 ) ÷ 728] x 100 = -69.64%
Formula
Percentage change = [(221 - 728) / 728] x 100
Subtract the new number by the original number
221 - 728 = -507
-507 ÷ 728 = -0.6964285714285714
-0.6964285714285714 x 100 = -69.64%