-12.82% is the change from 78 to 68
Calculation steps:
[( 68 - 78 ) ÷ 78] x 100 = -12.82%
Formula
Percentage change = [(68 - 78) / 78] x 100
Subtract the new number by the original number
68 - 78 = -10
-10 ÷ 78 = -0.1282051282051282
-0.1282051282051282 x 100 = -12.82%