-75.64% is the change from 78 to 19
Calculation steps:
[( 19 - 78 ) ÷ 78] x 100 = -75.64%
Formula
Percentage change = [(19 - 78) / 78] x 100
Subtract the new number by the original number
19 - 78 = -59
-59 ÷ 78 = -0.7564102564102564
-0.7564102564102564 x 100 = -75.64%