-5.83% is the change from 978 to 921
Calculation steps:
[( 921 - 978 ) ÷ 978] x 100 = -5.83%
Formula
Percentage change = [(921 - 978) / 978] x 100
Subtract the new number by the original number
921 - 978 = -57
-57 ÷ 978 = -0.05828220858895705
-0.05828220858895705 x 100 = -5.83%