-33.3% is the change from 994 to 663
Calculation steps:
[( 663 - 994 ) ÷ 994] x 100 = -33.3%
Formula
Percentage change = [(663 - 994) / 994] x 100
Subtract the new number by the original number
663 - 994 = -331
-331 ÷ 994 = -0.3329979879275654
-0.3329979879275654 x 100 = -33.3%