-73.1% is the change from 290 to 78
Calculation steps:
[( 78 - 290 ) ÷ 290] x 100 = -73.1%
Formula
Percentage change = [(78 - 290) / 290] x 100
Subtract the new number by the original number
78 - 290 = -212
-212 ÷ 290 = -0.7310344827586207
-0.7310344827586207 x 100 = -73.1%