-7.98% is the change from 978 to 900
Calculation steps:
[( 900 - 978 ) ÷ 978] x 100 = -7.98%
Formula
Percentage change = [(900 - 978) / 978] x 100
Subtract the new number by the original number
900 - 978 = -78
-78 ÷ 978 = -0.07975460122699386
-0.07975460122699386 x 100 = -7.98%