-7.14% is the change from 84 to 78
Calculation steps:
[( 78 - 84 ) ÷ 84] x 100 = -7.14%
Formula
Percentage change = [(78 - 84) / 84] x 100
Subtract the new number by the original number
78 - 84 = -6
-6 ÷ 84 = -0.07142857142857142
-0.07142857142857142 x 100 = -7.14%