-56.95% is the change from 978 to 421
Calculation steps:
[( 421 - 978 ) ÷ 978] x 100 = -56.95%
Formula
Percentage change = [(421 - 978) / 978] x 100
Subtract the new number by the original number
421 - 978 = -557
-557 ÷ 978 = -0.5695296523517382
-0.5695296523517382 x 100 = -56.95%