Add 7/2 and 15/20
1st number: 3 1/2, 2nd number: 15/20
7/2 + 15/20 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
7/2 = 7 × 10/2 × 10 = 70/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
15/20 = 15 × 1/20 × 1 = 15/20 - Add the two like fractions:
70/20 + 15/20 = 70 + 15/20 = 85/20 - 85/20 simplified gives 17/4
- So, 7/2 + 15/20 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/2+15/20 7/2+30/20 7/4+15/20 7/2+15/40 21/2+15/20 7/2+45/20 7/6+15/20 7/2+15/60 35/2+15/20 7/2+75/20 7/10+15/20 49/2+15/20 7/14+15/20