-16.05% is the change from 978 to 821
Calculation steps:
[( 821 - 978 ) ÷ 978] x 100 = -16.05%
Formula
Percentage change = [(821 - 978) / 978] x 100
Subtract the new number by the original number
821 - 978 = -157
-157 ÷ 978 = -0.1605316973415133
-0.1605316973415133 x 100 = -16.05%