Add 12/7 and 15/40
1st number: 1 5/7, 2nd number: 15/40
12/7 + 15/40 is 117/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
12/7 = 12 × 40/7 × 40 = 480/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Add the two like fractions:
480/280 + 105/280 = 480 + 105/280 = 585/280 - 585/280 simplified gives 117/56
- So, 12/7 + 15/40 = 117/56
In mixed form: 25/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7+15/40 12/7+30/40 12/14+15/40 12/7+15/80 36/7+15/40 12/7+45/40 12/21+15/40 60/7+15/40 12/7+75/40 12/35+15/40 84/7+15/40 12/49+15/40