-12.99% is the change from 978 to 851
Calculation steps:
[( 851 - 978 ) ÷ 978] x 100 = -12.99%
Formula
Percentage change = [(851 - 978) / 978] x 100
Subtract the new number by the original number
851 - 978 = -127
-127 ÷ 978 = -0.12985685071574643
-0.12985685071574643 x 100 = -12.99%