-84.15% is the change from 978 to 155
Calculation steps:
[( 155 - 978 ) ÷ 978] x 100 = -84.15%
Formula
Percentage change = [(155 - 978) / 978] x 100
Subtract the new number by the original number
155 - 978 = -823
-823 ÷ 978 = -0.8415132924335378
-0.8415132924335378 x 100 = -84.15%