Add 72/30 and 9/28
1st number: 2 12/30, 2nd number: 9/28
72/30 + 9/28 is 381/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
72/30 = 72 × 14/30 × 14 = 1008/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
9/28 = 9 × 15/28 × 15 = 135/420 - Add the two like fractions:
1008/420 + 135/420 = 1008 + 135/420 = 1143/420 - 1143/420 simplified gives 381/140
- So, 72/30 + 9/28 = 381/140
In mixed form: 2101/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+18/28 72/60+9/28 72/30+9/56 72/30+27/28 72/90+9/28 72/30+9/84 72/30+45/28 72/30+63/28