Add 18/56 and 45/20
1st number: 18/56, 2nd number: 2 5/20
18/56 + 45/20 is 18/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 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 20 × 14 = 280,
45/20 = 45 × 14/20 × 14 = 630/280 - Add the two like fractions:
90/280 + 630/280 = 90 + 630/280 = 720/280 - 720/280 simplified gives 18/7
- So, 18/56 + 45/20 = 18/7
In mixed form: 24/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/56+45/20 18/56+90/20 18/56+45/40 54/56+45/20 18/56+45/60 90/56+45/20