-63.16% is the change from 19 to 7
Calculation steps:
[( 7 - 19 ) ÷ 19] x 100 = -63.16%
Formula
Percentage change = [(7 - 19) / 19] x 100
Subtract the new number by the original number
7 - 19 = -12
-12 ÷ 19 = -0.631578947368421
-0.631578947368421 x 100 = -63.16%