-76.79% is the change from 336 to 78
Calculation steps:
[( 78 - 336 ) ÷ 336] x 100 = -76.79%
Formula
Percentage change = [(78 - 336) / 336] x 100
Subtract the new number by the original number
78 - 336 = -258
-258 ÷ 336 = -0.7678571428571429
-0.7678571428571429 x 100 = -76.79%