-32.14% is the change from 977 to 663
Calculation steps:
[( 663 - 977 ) ÷ 977] x 100 = -32.14%
Formula
Percentage change = [(663 - 977) / 977] x 100
Subtract the new number by the original number
663 - 977 = -314
-314 ÷ 977 = -0.32139201637666326
-0.32139201637666326 x 100 = -32.14%