Add 40/75 and 20/15, Solve 40/75 + 1 5/15 as a fraction

Add 40/75 and 20/15

1^st number: 40/75, 2^nd number: 1 5/15

40/75 + 20/15 is 28/15.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 15 is 75

Next, find the equivalent fraction of both fractional numbers with denominator 75
For the 1st fraction, since 75 × 1 = 75,
40/75 = 40 × 1/75 × 1 = 40/75
Likewise, for the 2nd fraction, since 15 × 5 = 75,
20/15 = 20 × 5/15 × 5 = 100/75
Add the two like fractions:
40/75 + 100/75 = 40 + 100/75 = 140/75
140/75 simplified gives 28/15
So, 40/75 + 20/15 = 28/15
In mixed form: 113/15

MathStep (Works offline)

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