Add 45/12 and 30/35
1st number: 3 9/12, 2nd number: 30/35
45/12 + 30/35 is 129/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
45/12 = 45 × 35/12 × 35 = 1575/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
30/35 = 30 × 12/35 × 12 = 360/420 - Add the two like fractions:
1575/420 + 360/420 = 1575 + 360/420 = 1935/420 - 1935/420 simplified gives 129/28
- So, 45/12 + 30/35 = 129/28
In mixed form: 417/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+30/35 45/12+60/35 45/24+30/35 45/12+30/70 45/12+90/35 45/36+30/35 45/60+30/35 45/84+30/35