-30.78% is the change from 978 to 677
Calculation steps:
[( 677 - 978 ) ÷ 978] x 100 = -30.78%
Formula
Percentage change = [(677 - 978) / 978] x 100
Subtract the new number by the original number
677 - 978 = -301
-301 ÷ 978 = -0.30777096114519426
-0.30777096114519426 x 100 = -30.78%