Add 28/21 and 48/45
1st number: 1 7/21, 2nd number: 1 3/45
28/21 + 48/45 is 12/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
28/21 = 28 × 15/21 × 15 = 420/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
48/45 = 48 × 7/45 × 7 = 336/315 - Add the two like fractions:
420/315 + 336/315 = 420 + 336/315 = 756/315 - 756/315 simplified gives 12/5
- So, 28/21 + 48/45 = 12/5
In mixed form: 22/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+48/45 28/21+96/45 28/42+48/45 28/21+48/90 84/21+48/45 28/63+48/45