Add 18/7 and 72/8
1st number: 2 4/7, 2nd number: 9 0/8
18/7 + 72/8 is 81/7.
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,
18/7 = 18 × 8/7 × 8 = 144/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
72/8 = 72 × 7/8 × 7 = 504/56 - Add the two like fractions:
144/56 + 504/56 = 144 + 504/56 = 648/56 - 648/56 simplified gives 81/7
- So, 18/7 + 72/8 = 81/7
In mixed form: 114/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7+72/8 18/14+72/8 18/7+72/16 54/7+72/8 18/21+72/8 18/7+72/24 90/7+72/8 18/35+72/8 18/7+72/40 18/49+72/8 18/7+72/56