To solve this expression, we need to follow the order of operations (PEMDAS).

First, we need to simplify the term inside the parentheses following the operation of division:

(3/5 - 19/25) = (15/25 - 19/25) = -4/25

Next, we multiply -4/25 by 75/16:

(-4/25)*(75/16) = -300/400 = -3/4

Now, we simplify the fraction 1:1, which equals 1.5.

Finally, we multiply 1.5 by -27/8:

1.5*(-27/8) = -40.5/8 = -5.06

Putting it all together, the expression is:

-3/4 - (-5.06) = -3/4 + 5.06 = 4.31