-30.14% is the change from 949 to 663
Calculation steps:
[( 663 - 949 ) ÷ 949] x 100 = -30.14%
Formula
Percentage change = [(663 - 949) / 949] x 100
Subtract the new number by the original number
663 - 949 = -286
-286 ÷ 949 = -0.3013698630136986
-0.3013698630136986 x 100 = -30.14%