Add 5/4 and 15/40
1st number: 1 1/4, 2nd number: 15/40
5/4 + 15/40 is 13/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 4 × 10 = 40,
5/4 = 5 × 10/4 × 10 = 50/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Add the two like fractions:
50/40 + 15/40 = 50 + 15/40 = 65/40 - 65/40 simplified gives 13/8
- So, 5/4 + 15/40 = 13/8
In mixed form: 15/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/4+15/40 5/4+30/40 5/8+15/40 5/4+15/80 15/4+15/40 5/4+45/40 5/12+15/40 25/4+15/40 5/4+75/40 5/20+15/40 35/4+15/40 5/28+15/40