2*2:5

It seems like you are presenting a mathematical expression. The expression "2*2:5" can be interpreted in a couple of ways depending on the intended mathematical operations.

1. If you mean to multiply and then divide, it can be written as: \[ \frac{2 \times 2}{5} \] which simplifies to: \[ \frac{4}{5} = 0.8 \]

2. If you are interpreting the colon as a ratio, then "2*2:5" might denote a ratio of \(4:5\).

Could you please clarify what you intended with the expression?