Add 42/9 and 72/28
1st number: 4 6/9, 2nd number: 2 16/28
42/9 + 72/28 is 152/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 9 × 28 = 252,
42/9 = 42 × 28/9 × 28 = 1176/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
72/28 = 72 × 9/28 × 9 = 648/252 - Add the two like fractions:
1176/252 + 648/252 = 1176 + 648/252 = 1824/252 - 1824/252 simplified gives 152/21
- So, 42/9 + 72/28 = 152/21
In mixed form: 75/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9+72/28 42/18+72/28 42/9+72/56 42/27+72/28 42/9+72/84 42/45+72/28 42/63+72/28