Question

Anna said that the product of 7/8 · 1 1/2 = 7/2How can you tell that her answer is wrond?

Answer 1

Here is your answer:

1 1/2 = 3/2

7 × 3 = 21

8 × 2 = 16

Divided to equal $1\frac{5}{16}$ <--- Real answer:

The reason why she multiplied her answer wrong, she also "kept her original numerator and denominator."

Hope this helps!