What is 20 percent off 19.50?

20% off of 19.50 leaves 15.60 (19.50 x 0.8). 20% of 19.50 is 3.90 (15.60 x 0.2).

another way to do it is:

find 10% this is easy just move the decimal point one place to the left = 1.95.

Now double this because you want 20% = 1.95 x 2 = 3.90

Now subtract 3.90 from 19.50 = 19.50 - 3.90 = 15.60