Add 49/21 and 12/72
1st number: 2 7/21, 2nd number: 12/72
49/21 + 12/72 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
49/21 = 49 × 24/21 × 24 = 1176/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
12/72 = 12 × 7/72 × 7 = 84/504 - Add the two like fractions:
1176/504 + 84/504 = 1176 + 84/504 = 1260/504 - 1260/504 simplified gives 5/2
- So, 49/21 + 12/72 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21+12/72 49/21+24/72 49/42+12/72 49/21+36/72 49/63+12/72 49/21+60/72 49/21+84/72