Question

-1/2×3/5+3/2-3/5×5/4

Answer 1

-1/2×3/5+3/2-3/5×5/4
=-3/10+3/2-15/20
=(-6+30-15)/20
=9/20

HOPE IT HELPS!!

Answer 2

Follow the BODMAS rule. 
$\frac{-1}{2} * \frac{3}{5} + \frac{3}{2} - \frac{3}{5} * \frac{5}{4}$
$= \frac{-1}{2} * \frac{3}{5} + \frac{3}{2} + \frac{-3}{5} * \frac{5}{4}$
$= \frac{-3}{10} + \frac{3}{2} + \frac{-3}{4}$
$= \frac{-6+30+(-15)}{20}$
$= \frac{-6+30-15}{20}$
$= \frac{3(-2+10-5)}{20}$
$= \frac{3(10-7)}{20}$
$= \frac{3(3)}{20}$
$= \frac{9}{20}$

Hope this may help you.