-90.9% is the change from 978 to 89
Calculation steps:
[( 89 - 978 ) ÷ 978] x 100 = -90.9%
Formula
Percentage change = [(89 - 978) / 978] x 100
Subtract the new number by the original number
89 - 978 = -889
-889 ÷ 978 = -0.908997955010225
-0.908997955010225 x 100 = -90.9%