-97.44% is the change from 78 to 2
Calculation steps:
[( 2 - 78 ) ÷ 78] x 100 = -97.44%
Formula
Percentage change = [(2 - 78) / 78] x 100
Subtract the new number by the original number
2 - 78 = -76
-76 ÷ 78 = -0.9743589743589743
-0.9743589743589743 x 100 = -97.44%