-90.85% is the change from 721 to 66
Calculation steps:
[( 66 - 721 ) ÷ 721] x 100 = -90.85%
Formula
Percentage change = [(66 - 721) / 721] x 100
Subtract the new number by the original number
66 - 721 = -655
-655 ÷ 721 = -0.9084604715672677
-0.9084604715672677 x 100 = -90.85%