-21.88% is the change from 978 to 764
Calculation steps:
[( 764 - 978 ) ÷ 978] x 100 = -21.88%
Formula
Percentage change = [(764 - 978) / 978] x 100
Subtract the new number by the original number
764 - 978 = -214
-214 ÷ 978 = -0.21881390593047034
-0.21881390593047034 x 100 = -21.88%