-32.41% is the change from 978 to 661
Calculation steps:
[( 661 - 978 ) ÷ 978] x 100 = -32.41%
Formula
Percentage change = [(661 - 978) / 978] x 100
Subtract the new number by the original number
661 - 978 = -317
-317 ÷ 978 = -0.32413087934560325
-0.32413087934560325 x 100 = -32.41%