-49.95% is the change from 977 to 489
Calculation steps:
[( 489 - 977 ) ÷ 977] x 100 = -49.95%
Formula
Percentage change = [(489 - 977) / 977] x 100
Subtract the new number by the original number
489 - 977 = -488
-488 ÷ 977 = -0.49948822927328557
-0.49948822927328557 x 100 = -49.95%