Add 63/21 and 15/54
1st number: 3 0/21, 2nd number: 15/54
63/21 + 15/54 is 59/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
63/21 = 63 × 18/21 × 18 = 1134/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
15/54 = 15 × 7/54 × 7 = 105/378 - Add the two like fractions:
1134/378 + 105/378 = 1134 + 105/378 = 1239/378 - 1239/378 simplified gives 59/18
- So, 63/21 + 15/54 = 59/18
In mixed form: 35/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+30/54 63/42+15/54 63/21+45/54 63/21+75/54