101:111

It seems you've entered a binary number. The binary number "101:111" could be interpreted in a few ways depending on the context. If you're looking to convert the binary numbers 101 and 111 into decimal:

• 101 in binary is equal to \(1 \times 2^2 + 0 \times 2^1 + 1 \times 2^0 = 4 + 0 + 1 = 5\) in decimal.
• 111 in binary is equal to \(1 \times 2^2 + 1 \times 2^1 + 1 \times 2^0 = 4 + 2 + 1 = 7\) in decimal.

So, 101:111 in decimal would be 5:7.

If you have a different context or question in mind, please provide more details!