Add 7/4 and 15/20
1st number: 1 3/4, 2nd number: 15/20
7/4 + 15/20 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
7/4 = 7 × 5/4 × 5 = 35/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
15/20 = 15 × 1/20 × 1 = 15/20 - Add the two like fractions:
35/20 + 15/20 = 35 + 15/20 = 50/20 - 50/20 simplified gives 5/2
- So, 7/4 + 15/20 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/4+15/20 7/4+30/20 7/8+15/20 7/4+15/40 21/4+15/20 7/4+45/20 7/12+15/20 7/4+15/60 35/4+15/20 7/4+75/20 7/20+15/20 49/4+15/20 7/28+15/20