Add 40/6 and 28/80, Solve 6 4/6 + 28/80 as a fraction

Add 40/6 and 28/80

1^st number: 6 4/6, 2^nd number: 28/80

40/6 + 28/80 is 421/60.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 80 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 6 × 40 = 240,
40/6 = 40 × 40/6 × 40 = 1600/240
Likewise, for the 2nd fraction, since 80 × 3 = 240,
28/80 = 28 × 3/80 × 3 = 84/240
Add the two like fractions:
1600/240 + 84/240 = 1600 + 84/240 = 1684/240
1684/240 simplified gives 421/60
So, 40/6 + 28/80 = 421/60
In mixed form: 71/60

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad