Add 54/4 and 5/21
1st number: 13 2/4, 2nd number: 5/21
54/4 + 5/21 is 577/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
54/4 = 54 × 21/4 × 21 = 1134/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84 - Add the two like fractions:
1134/84 + 20/84 = 1134 + 20/84 = 1154/84 - 1154/84 simplified gives 577/42
- So, 54/4 + 5/21 = 577/42
In mixed form: 1331/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/4+10/21 54/8+5/21 54/4+5/42 54/4+15/21 54/12+5/21 54/4+5/63 54/4+25/21 54/20+5/21 54/4+35/21 54/28+5/21