-32.96% is the change from 989 to 663
Calculation steps:
[( 663 - 989 ) ÷ 989] x 100 = -32.96%
Formula
Percentage change = [(663 - 989) / 989] x 100
Subtract the new number by the original number
663 - 989 = -326
-326 ÷ 989 = -0.32962588473205257
-0.32962588473205257 x 100 = -32.96%