Add 72/28 and 3/18
1st number: 2 16/28, 2nd number: 3/18
72/28 + 3/18 is 115/42.
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,
72/28 = 72 × 9/28 × 9 = 648/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
3/18 = 3 × 14/18 × 14 = 42/252 - Add the two like fractions:
648/252 + 42/252 = 648 + 42/252 = 690/252 - 690/252 simplified gives 115/42
- So, 72/28 + 3/18 = 115/42
In mixed form: 231/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/28+6/18 72/56+3/18 72/28+3/36 72/28+9/18 72/84+3/18 72/28+3/54 72/28+15/18 72/28+3/90 72/28+21/18