-93.54% is the change from 990 to 64
Calculation steps:
[( 64 - 990 ) ÷ 990] x 100 = -93.54%
Formula
Percentage change = [(64 - 990) / 990] x 100
Subtract the new number by the original number
64 - 990 = -926
-926 ÷ 990 = -0.9353535353535354
-0.9353535353535354 x 100 = -93.54%