-78.21% is the change from 78 to 17
Calculation steps:
[( 17 - 78 ) ÷ 78] x 100 = -78.21%
Formula
Percentage change = [(17 - 78) / 78] x 100
Subtract the new number by the original number
17 - 78 = -61
-61 ÷ 78 = -0.782051282051282
-0.782051282051282 x 100 = -78.21%