Question

How can i evaluate this expression 3/2-4/7

Answer 1

$simple\ method:\\\\\dfrac{a}{b}-\dfrac{c}{d}=\dfrac{ad-bc}{bd}\\==================\\\dfrac{3}{2}-\dfrac{4}{7}=\dfrac{3\cdot7-2\cdot4}{2\cdot7}=\dfrac{21-8}{14}=\boxed{\dfrac{13}{14}}$

Answer 2

$\frac{3}{2} - \frac{4}{7}$
$= \frac{3}{2} + \frac{-4}{7}$
$= \frac{21}{14} + \frac{-8}{14}$
$= \frac{21+-8}{14}$
$= \frac{13}{14}$
Decimal: 0.928571