Add 8/28 and 72/18
1st number: 8/28, 2nd number: 4 0/18
8/28 + 72/18 is 30/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
8/28 = 8 × 9/28 × 9 = 72/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
72/18 = 72 × 14/18 × 14 = 1008/252 - Add the two like fractions:
72/252 + 1008/252 = 72 + 1008/252 = 1080/252 - 1080/252 simplified gives 30/7
- So, 8/28 + 72/18 = 30/7
In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/28+72/18 8/56+72/18 8/28+72/36 24/28+72/18 8/84+72/18 8/28+72/54 40/28+72/18 8/28+72/90 56/28+72/18