Add 54/4 and 18/21
1st number: 13 2/4, 2nd number: 18/21
54/4 + 18/21 is 201/14.
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,
18/21 = 18 × 4/21 × 4 = 72/84 - Add the two like fractions:
1134/84 + 72/84 = 1134 + 72/84 = 1206/84 - 1206/84 simplified gives 201/14
- So, 54/4 + 18/21 = 201/14
In mixed form: 145/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/4+36/21 54/8+18/21 54/4+18/42 54/4+54/21 54/12+18/21 54/4+18/63 54/4+90/21 54/20+18/21 54/28+18/21