Add 18/56 and 15/40
18/56 + 15/40 is 39/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
18/56 = 18 × 5/56 × 5 = 90/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Add the two like fractions:
90/280 + 105/280 = 90 + 105/280 = 195/280 - 195/280 simplified gives 39/56
- So, 18/56 + 15/40 = 39/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/56+15/40 18/56+30/40 18/56+15/80 54/56+15/40 18/56+45/40 90/56+15/40 18/56+75/40