Add 70/42 and 12/72
1st number: 1 28/42, 2nd number: 12/72
70/42 + 12/72 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
70/42 = 70 × 12/42 × 12 = 840/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
12/72 = 12 × 7/72 × 7 = 84/504 - Add the two like fractions:
840/504 + 84/504 = 840 + 84/504 = 924/504 - 924/504 simplified gives 11/6
- So, 70/42 + 12/72 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+24/72 70/84+12/72 70/42+36/72 70/42+60/72 70/42+84/72