How do you subtract $2\frac { 4} { 5} - 1\frac { 2} { 5} - \frac { 5} { 8}$ ?

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Answer 1 · 2016-12-14T21:11:23

$31/40$

First we should remove all the mixed numbers and turn them into fractions.

$2 4/5$ can be rewritten as $10/5 + 4/5 = 14/5$ .
$1 2/5$ can be rewritten as $5/5 + 2/5 = 7/5$ .

Next we should give all the fraction the same denominator.

$14/5 * 8/8 = 112/40$
$7/5 * 8/8 = 56/40$
$5/8 * 5/5 = 25/40$

Now we can solve.

$112/40 - 56/40 - 25/40 = (112-56-25)/40 = 31/40$

How do you subtract 2\frac { 4} { 5} - 1\frac { 2} { 5} - \frac { 5} { 8}2\frac { 4} { 5} - 1\frac { 2} { 5} - \frac { 5} { 8}?