Add 21/18 and 7/54
1st number: 1 3/18, 2nd number: 7/54
21/18 + 7/54 is 35/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 18 × 3 = 54,
21/18 = 21 × 3/18 × 3 = 63/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
7/54 = 7 × 1/54 × 1 = 7/54 - Add the two like fractions:
63/54 + 7/54 = 63 + 7/54 = 70/54 - 70/54 simplified gives 35/27
- So, 21/18 + 7/54 = 35/27
In mixed form: 18/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+7/54 21/18+14/54 21/36+7/54 63/18+7/54 21/18+21/54 21/54+7/54 21/18+35/54 21/90+7/54 21/18+49/54