1/2:3/4+4.05

To solve the expression 1/2:3/4+4.05, we need to follow the order of operations (PEMDAS).

1. Start with the division operation: 1/2 divided by 3/4 To divide fractions, we multiply the first fraction by the reciprocal of the second fraction: 1/2 ÷ 3/4 = 1/2 × 4/3 = 4/6 = 2/3

2. Next, add the result to 4.05: 2/3 + 4.05

   To add a fraction to a decimal, first convert the fraction to a decimal: 2/3 = 2 ÷ 3 ≈ 0.6667

   Now, add the decimal to 4.05: 0.6667 + 4.05 = 4.7167

Therefore, the final answer to the expression 1/2:3/4+4.05 is approximately 4.7167.