Add 15/35 and 45/12
1st number: 15/35, 2nd number: 3 9/12
15/35 + 45/12 is 117/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 35 × 12 = 420,
15/35 = 15 × 12/35 × 12 = 180/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
45/12 = 45 × 35/12 × 35 = 1575/420 - Add the two like fractions:
180/420 + 1575/420 = 180 + 1575/420 = 1755/420 - 1755/420 simplified gives 117/28
- So, 15/35 + 45/12 = 117/28
In mixed form: 45/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/35+45/12 15/35+90/12 15/70+45/12 15/35+45/24 45/35+45/12 15/35+45/36 75/35+45/12 15/35+45/60 15/35+45/84