Add 80/30 and 70/12
1st number: 2 20/30, 2nd number: 5 10/12
80/30 + 70/12 is 17/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
80/30 = 80 × 2/30 × 2 = 160/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
70/12 = 70 × 5/12 × 5 = 350/60 - Add the two like fractions:
160/60 + 350/60 = 160 + 350/60 = 510/60 - 510/60 simplified gives 17/2
- So, 80/30 + 70/12 = 17/2
In mixed form: 81/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/60+70/12 80/30+70/24 80/90+70/12 80/30+70/36 80/30+70/60 80/30+70/84