How do you simplify $3 7/8 - 1 1/5$ ?

Question

2400 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-11-04T09:35:34

The answer is $107/40$ or $2 27/40$ .

$3 7/8-1 1/5$

Convert both mixed fractions to improper fractions.

$(8xx3+7)/8-(5xx1+1)/5=$

$31/8-6/5$

Determine the LCD by listing multiples.

$8:$ $8, 16, 24, 32, 40$

$5:$ $5, 10, 15, 20, 25, 30, 35, 40$

The LCD is $40$ .

Multiply each fraction by a number that will make both denominators $40$ .

$(31/8xx5/5)-(6/5xx8/8)=$

$155/40-48/40$

Simplify.

$((155-48))/40=$

$107/40$

How do you simplify 3 7/8 - 1 1/53 7/8 - 1 1/5?