Add 42/28 and 12/72
1st number: 1 14/28, 2nd number: 12/72
42/28 + 12/72 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
42/28 = 42 × 18/28 × 18 = 756/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
12/72 = 12 × 7/72 × 7 = 84/504 - Add the two like fractions:
756/504 + 84/504 = 756 + 84/504 = 840/504 - 840/504 simplified gives 5/3
- So, 42/28 + 12/72 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28+12/72 42/28+24/72 42/56+12/72 42/28+36/72 42/84+12/72 42/28+60/72 42/28+84/72