Add 70/20 and 12/7
1st number: 3 10/20, 2nd number: 1 5/7
70/20 + 12/7 is 73/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
70/20 = 70 × 7/20 × 7 = 490/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
12/7 = 12 × 20/7 × 20 = 240/140 - Add the two like fractions:
490/140 + 240/140 = 490 + 240/140 = 730/140 - 730/140 simplified gives 73/14
- So, 70/20 + 12/7 = 73/14
In mixed form: 53/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+24/7 70/40+12/7 70/20+12/14 70/20+36/7 70/60+12/7 70/20+12/21 70/20+60/7 70/20+12/35 70/20+84/7 70/20+12/49