-89.99% is the change from 979 to 98
Calculation steps:
[( 98 - 979 ) ÷ 979] x 100 = -89.99%
Formula
Percentage change = [(98 - 979) / 979] x 100
Subtract the new number by the original number
98 - 979 = -881
-881 ÷ 979 = -0.8998978549540347
-0.8998978549540347 x 100 = -89.99%