-78.32% is the change from 978 to 212
Calculation steps:
[( 212 - 978 ) ÷ 978] x 100 = -78.32%
Formula
Percentage change = [(212 - 978) / 978] x 100
Subtract the new number by the original number
212 - 978 = -766
-766 ÷ 978 = -0.7832310838445807
-0.7832310838445807 x 100 = -78.32%