Question

Fraction multiplication both mixed fraction -always cross reduce 1 2/3 * 1 7/10

Answer 1

There are 2 mixed numbers in  1 2/3 * 1 7/10.  One is 1 2/3; the other is 1 7/10.

Convert both to improper fractions:  1 2/3 becomes 5/2, and 1 7/10 becomes 17/10.
                                               5      17
Then your task is to multiply ---- * ----- , which, after reducing 5/10, becomes
                                               2      10


17/4  (answer)

Answer 2

$1\dfrac{2}{3} \times 1 \dfrac{7}{10}$

Change to improper fractions:
$= \dfrac{5}{3} \times \dfrac{17}{10}$

Cancel common factor 5:
$= \dfrac{1 \times 5}{3} \times \dfrac{17}{2 \times 5}$

$= \dfrac{1} {3} \times \dfrac{17}{2}$

Combine:
$= \dfrac{17} {6}$

Simplify:
$= 2\dfrac{5} {6}$