-35.41% is the change from 977 to 631
Calculation steps:
[( 631 - 977 ) ÷ 977] x 100 = -35.41%
Formula
Percentage change = [(631 - 977) / 977] x 100
Subtract the new number by the original number
631 - 977 = -346
-346 ÷ 977 = -0.3541453428863869
-0.3541453428863869 x 100 = -35.41%