-99.59% is the change from 977 to 4
Calculation steps:
[( 4 - 977 ) ÷ 977] x 100 = -99.59%
Formula
Percentage change = [(4 - 977) / 977] x 100
Subtract the new number by the original number
4 - 977 = -973
-973 ÷ 977 = -0.9959058341862845
-0.9959058341862845 x 100 = -99.59%