-61.54% is the change from 78 to 30
Calculation steps:
[( 30 - 78 ) ÷ 78] x 100 = -61.54%
Formula
Percentage change = [(30 - 78) / 78] x 100
Subtract the new number by the original number
30 - 78 = -48
-48 ÷ 78 = -0.6153846153846154
-0.6153846153846154 x 100 = -61.54%