Add 70/80 and 30/12
1st number: 70/80, 2nd number: 2 6/12
70/80 + 30/12 is 27/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 12 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
70/80 = 70 × 3/80 × 3 = 210/240 - Likewise, for the 2nd fraction, since 12 × 20 = 240,
30/12 = 30 × 20/12 × 20 = 600/240 - Add the two like fractions:
210/240 + 600/240 = 210 + 600/240 = 810/240 - 810/240 simplified gives 27/8
- So, 70/80 + 30/12 = 27/8
In mixed form: 33/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80+60/12 70/80+30/24 70/80+90/12 70/80+30/36 70/80+30/60 70/80+30/84