-29.17% is the change from 936 to 663
Calculation steps:
[( 663 - 936 ) ÷ 936] x 100 = -29.17%
Formula
Percentage change = [(663 - 936) / 936] x 100
Subtract the new number by the original number
663 - 936 = -273
-273 ÷ 936 = -0.2916666666666667
-0.2916666666666667 x 100 = -29.17%