Add 20/8 and 70/7
1st number: 2 4/8, 2nd number: 10 0/7
20/8 + 70/7 is 25/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
20/8 = 20 × 7/8 × 7 = 140/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
70/7 = 70 × 8/7 × 8 = 560/56 - Add the two like fractions:
140/56 + 560/56 = 140 + 560/56 = 700/56 - 700/56 simplified gives 25/2
- So, 20/8 + 70/7 = 25/2
In mixed form: 121/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8+70/7 20/16+70/7 20/8+70/14 60/8+70/7 20/24+70/7 20/8+70/21 20/40+70/7 20/8+70/35 20/56+70/7 20/8+70/49