Add 54/63 and 12/9
1st number: 54/63, 2nd number: 1 3/9
54/63 + 12/9 is 46/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
54/63 = 54 × 1/63 × 1 = 54/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Add the two like fractions:
54/63 + 84/63 = 54 + 84/63 = 138/63 - 138/63 simplified gives 46/21
- So, 54/63 + 12/9 = 46/21
In mixed form: 24/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/63+24/9 54/63+12/18 54/63+36/9 54/63+12/27 54/63+60/9 54/63+12/45 54/63+84/9 54/63+12/63