2-3:4*5

To solve the expression \(2 - \frac{3}{4} \times 5\), you should follow the order of operations, also known as PEMDAS/BODMAS:

1. Perform multiplication first: \(\frac{3}{4} \times 5 = \frac{15}{4} = 3.75\).

2. Now substitute back into the expression: \(2 - 3.75\).

3. Finally, perform the subtraction: \(2 - 3.75 = -1.75\).

Thus, the final answer is \(-1.75\).