-83.95% is the change from 978 to 157
Calculation steps:
[( 157 - 978 ) ÷ 978] x 100 = -83.95%
Formula
Percentage change = [(157 - 978) / 978] x 100
Subtract the new number by the original number
157 - 978 = -821
-821 ÷ 978 = -0.8394683026584867
-0.8394683026584867 x 100 = -83.95%