Add 30/21 and 48/9
1st number: 1 9/21, 2nd number: 5 3/9
30/21 + 48/9 is 142/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
30/21 = 30 × 3/21 × 3 = 90/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
48/9 = 48 × 7/9 × 7 = 336/63 - Add the two like fractions:
90/63 + 336/63 = 90 + 336/63 = 426/63 - 426/63 simplified gives 142/21
- So, 30/21 + 48/9 = 142/21
In mixed form: 616/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+48/9 30/21+96/9 30/42+48/9 30/21+48/18 90/21+48/9 30/63+48/9 30/21+48/27 30/21+48/45 30/21+48/63