Add 70/8 and 21/7
1st number: 8 6/8, 2nd number: 3 0/7
70/8 + 21/7 is 47/4.
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,
70/8 = 70 × 7/8 × 7 = 490/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
21/7 = 21 × 8/7 × 8 = 168/56 - Add the two like fractions:
490/56 + 168/56 = 490 + 168/56 = 658/56 - 658/56 simplified gives 47/4
- So, 70/8 + 21/7 = 47/4
In mixed form: 113/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/8+42/7 70/16+21/7 70/8+21/14 70/8+63/7 70/24+21/7 70/40+21/7 70/8+21/35 70/56+21/7 70/8+21/49