-87.51% is the change from 977 to 122
Calculation steps:
[( 122 - 977 ) ÷ 977] x 100 = -87.51%
Formula
Percentage change = [(122 - 977) / 977] x 100
Subtract the new number by the original number
122 - 977 = -855
-855 ÷ 977 = -0.8751279426816786
-0.8751279426816786 x 100 = -87.51%