-50.97% is the change from 977 to 479
Calculation steps:
[( 479 - 977 ) ÷ 977] x 100 = -50.97%
Formula
Percentage change = [(479 - 977) / 977] x 100
Subtract the new number by the original number
479 - 977 = -498
-498 ÷ 977 = -0.5097236438075742
-0.5097236438075742 x 100 = -50.97%