Add 15/40 and 12/56
15/40 + 12/56 is 33/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
12/56 = 12 × 5/56 × 5 = 60/280 - Add the two like fractions:
105/280 + 60/280 = 105 + 60/280 = 165/280 - 165/280 simplified gives 33/56
- So, 15/40 + 12/56 = 33/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+12/56 15/40+24/56 15/80+12/56 45/40+12/56 15/40+36/56 75/40+12/56 15/40+60/56 15/40+84/56