Add 28/7 and 30/8
1st number: 4 0/7, 2nd number: 3 6/8
28/7 + 30/8 is 31/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
28/7 = 28 × 8/7 × 8 = 224/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
30/8 = 30 × 7/8 × 7 = 210/56 - Add the two like fractions:
224/56 + 210/56 = 224 + 210/56 = 434/56 - 434/56 simplified gives 31/4
- So, 28/7 + 30/8 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7+30/8 28/7+60/8 28/14+30/8 28/7+30/16 84/7+30/8 28/7+90/8 28/21+30/8 28/7+30/24 28/35+30/8 28/7+30/40 28/49+30/8 28/7+30/56