Add 15/30 and 7/4
1st number: 15/30, 2nd number: 1 3/4
15/30 + 7/4 is 9/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
15/30 = 15 × 2/30 × 2 = 30/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
7/4 = 7 × 15/4 × 15 = 105/60 - Add the two like fractions:
30/60 + 105/60 = 30 + 105/60 = 135/60 - 135/60 simplified gives 9/4
- So, 15/30 + 7/4 = 9/4
In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30+14/4 15/60+7/4 15/30+7/8 45/30+7/4 15/30+21/4 15/90+7/4 15/30+7/12 75/30+7/4 15/30+35/4 15/30+7/20 15/30+49/4 15/30+7/28