-49.64% is the change from 977 to 492
Calculation steps:
[( 492 - 977 ) ÷ 977] x 100 = -49.64%
Formula
Percentage change = [(492 - 977) / 977] x 100
Subtract the new number by the original number
492 - 977 = -485
-485 ÷ 977 = -0.49641760491299897
-0.49641760491299897 x 100 = -49.64%