-49.85% is the change from 977 to 490
Calculation steps:
[( 490 - 977 ) ÷ 977] x 100 = -49.85%
Formula
Percentage change = [(490 - 977) / 977] x 100
Subtract the new number by the original number
490 - 977 = -487
-487 ÷ 977 = -0.4984646878198567
-0.4984646878198567 x 100 = -49.85%