Add 90/12 and 70/15
1st number: 7 6/12, 2nd number: 4 10/15
90/12 + 70/15 is 73/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
90/12 = 90 × 5/12 × 5 = 450/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
70/15 = 70 × 4/15 × 4 = 280/60 - Add the two like fractions:
450/60 + 280/60 = 450 + 280/60 = 730/60 - 730/60 simplified gives 73/6
- So, 90/12 + 70/15 = 73/6
In mixed form: 121/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/24+70/15 90/12+70/30 90/36+70/15 90/12+70/45 90/60+70/15 90/12+70/75 90/84+70/15