-32.04% is the change from 977 to 664
Calculation steps:
[( 664 - 977 ) ÷ 977] x 100 = -32.04%
Formula
Percentage change = [(664 - 977) / 977] x 100
Subtract the new number by the original number
664 - 977 = -313
-313 ÷ 977 = -0.3203684749232344
-0.3203684749232344 x 100 = -32.04%