Answer:

The correct option is B.

Step-by-step explanation:

If a number n is multiply by a number than lies between 0 to 1, then the product is less than the initial number.

ktimes n<n   if 0<k<1

If a number n is multiply by a number that is greater than 1, then the product is greater than the initial number.

ktimes n>n   if k>1

It is given that Fiona multiplies a number by 2/3.The product is greater than 2/3. It means the number which is multiplies by Fiona is must be greater than 1.

frac{10}{12}<1

frac{6}{5}<1

frac{3}{3}=1

frac{2}{9}<1

That number is frac{6}{5}. Therefore the correct option is B.