Add 15/6 and 30/40, Solve 2 3/6 + 30/40 as a fraction

Add 15/6 and 30/40

1^st number: 2 3/6, 2^nd number: 30/40

15/6 + 30/40 is 13/4.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 6 × 20 = 120,
15/6 = 15 × 20/6 × 20 = 300/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
30/40 = 30 × 3/40 × 3 = 90/120
Add the two like fractions:
300/120 + 90/120 = 300 + 90/120 = 390/120
390/120 simplified gives 13/4
So, 15/6 + 30/40 = 13/4
In mixed form: 31/4

MathStep (Works offline)

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