Answer: 18Step-by-step explanation:1. SimplifyMultiply the denominator (4) to the whole number (2) and add the numerator (1) to the product then keep the denominator:4•2=8+1=9 (keep the denominator) then it would be: 9/42. Multiply the whole number (8) to the simplified expression:since 8 does not have a denominator, it is automatically 1, so;8 • 9 multiply = 72 (numerator)1 • 4 multiply = 4 (denominator)3. Divide 72 by 4:72÷4=18