-89.97% is the change from 977 to 98
Calculation steps:
[( 98 - 977 ) ÷ 977] x 100 = -89.97%
Formula
Percentage change = [(98 - 977) / 977] x 100
Subtract the new number by the original number
98 - 977 = -879
-879 ÷ 977 = -0.8996929375639714
-0.8996929375639714 x 100 = -89.97%