-91.12% is the change from 721 to 64
Calculation steps:
[( 64 - 721 ) ÷ 721] x 100 = -91.12%
Formula
Percentage change = [(64 - 721) / 721] x 100
Subtract the new number by the original number
64 - 721 = -657
-657 ÷ 721 = -0.9112343966712899
-0.9112343966712899 x 100 = -91.12%