-49.74% is the change from 977 to 491
Calculation steps:
[( 491 - 977 ) ÷ 977] x 100 = -49.74%
Formula
Percentage change = [(491 - 977) / 977] x 100
Subtract the new number by the original number
491 - 977 = -486
-486 ÷ 977 = -0.49744114636642783
-0.49744114636642783 x 100 = -49.74%