4:7-69*87

Let's evaluate the expression step-by-step:

Expression: 4:7 - 69 * 87

First, interpret the division symbol ':' as division:

1. Divide 4 by 7:

\[ \frac{4}{7} \approx 0.5714 \]

2. Calculate 69 * 87:

\[ 69 \times 87 \]

Break down 87:

\[ 69 \times 87 = 69 \times (80 + 7) = 69 \times 80 + 69 \times 7 = 5520 + 483 = 6003 \]

3. Now, subtract:

\[ 0.5714 - 6003 \approx -6002.4286 \]

Final answer: approximately -6002.43