-31.93% is the change from 977 to 665
Calculation steps:
[( 665 - 977 ) ÷ 977] x 100 = -31.93%
Formula
Percentage change = [(665 - 977) / 977] x 100
Subtract the new number by the original number
665 - 977 = -312
-312 ÷ 977 = -0.3193449334698055
-0.3193449334698055 x 100 = -31.93%