Add 7/28 and 70/30
1st number: 7/28, 2nd number: 2 10/30
7/28 + 70/30 is 31/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
7/28 = 7 × 15/28 × 15 = 105/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
70/30 = 70 × 14/30 × 14 = 980/420 - Add the two like fractions:
105/420 + 980/420 = 105 + 980/420 = 1085/420 - 1085/420 simplified gives 31/12
- So, 7/28 + 70/30 = 31/12
In mixed form: 27/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+70/30 7/56+70/30 7/28+70/60 21/28+70/30 7/84+70/30 7/28+70/90 35/28+70/30 49/28+70/30