Add 72/30 and 30/28
1st number: 2 12/30, 2nd number: 1 2/28
72/30 + 30/28 is 243/70.
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,
30/28 = 30 × 15/28 × 15 = 450/420 - Add the two like fractions:
1008/420 + 450/420 = 1008 + 450/420 = 1458/420 - 1458/420 simplified gives 243/70
- So, 72/30 + 30/28 = 243/70
In mixed form: 333/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+60/28 72/60+30/28 72/30+30/56 72/30+90/28 72/90+30/28 72/30+30/84