Add 70/20 and 5/7
1st number: 3 10/20, 2nd number: 5/7
70/20 + 5/7 is 59/14.
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,
5/7 = 5 × 20/7 × 20 = 100/140 - Add the two like fractions:
490/140 + 100/140 = 490 + 100/140 = 590/140 - 590/140 simplified gives 59/14
- So, 70/20 + 5/7 = 59/14
In mixed form: 43/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+10/7 70/40+5/7 70/20+5/14 70/20+15/7 70/60+5/7 70/20+5/21 70/20+25/7 70/20+5/35 70/20+35/7 70/20+5/49