Add 54/18 and 25/21
1st number: 3 0/18, 2nd number: 1 4/21
54/18 + 25/21 is 88/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
54/18 = 54 × 7/18 × 7 = 378/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
25/21 = 25 × 6/21 × 6 = 150/126 - Add the two like fractions:
378/126 + 150/126 = 378 + 150/126 = 528/126 - 528/126 simplified gives 88/21
- So, 54/18 + 25/21 = 88/21
In mixed form: 44/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18+50/21 54/36+25/21 54/18+25/42 54/18+75/21 54/18+25/63 54/90+25/21