-15.79% is the change from 19 to 16
Calculation steps:
[( 16 - 19 ) ÷ 19] x 100 = -15.79%
Formula
Percentage change = [(16 - 19) / 19] x 100
Subtract the new number by the original number
16 - 19 = -3
-3 ÷ 19 = -0.15789473684210525
-0.15789473684210525 x 100 = -15.79%