-78.63% is the change from 978 to 209
Calculation steps:
[( 209 - 978 ) ÷ 978] x 100 = -78.63%
Formula
Percentage change = [(209 - 978) / 978] x 100
Subtract the new number by the original number
209 - 978 = -769
-769 ÷ 978 = -0.7862985685071575
-0.7862985685071575 x 100 = -78.63%