-69.73% is the change from 730 to 221
Calculation steps:
[( 221 - 730 ) ÷ 730] x 100 = -69.73%
Formula
Percentage change = [(221 - 730) / 730] x 100
Subtract the new number by the original number
221 - 730 = -509
-509 ÷ 730 = -0.6972602739726027
-0.6972602739726027 x 100 = -69.73%