Add 48/12 and 15/21, Solve 4 0/12 + 15/21 as a fraction

Add 48/12 and 15/21

1^st number: 4 0/12, 2^nd number: 15/21

48/12 + 15/21 is 33/7.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
48/12 = 48 × 7/12 × 7 = 336/84
Likewise, for the 2nd fraction, since 21 × 4 = 84,
15/21 = 15 × 4/21 × 4 = 60/84
Add the two like fractions:
336/84 + 60/84 = 336 + 60/84 = 396/84
396/84 simplified gives 33/7
So, 48/12 + 15/21 = 33/7
In mixed form: 45/7

MathStep (Works offline)

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