Add 7/28 and 40/30
1st number: 7/28, 2nd number: 1 10/30
7/28 + 40/30 is 19/12.
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,
40/30 = 40 × 14/30 × 14 = 560/420 - Add the two like fractions:
105/420 + 560/420 = 105 + 560/420 = 665/420 - 665/420 simplified gives 19/12
- So, 7/28 + 40/30 = 19/12
In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+40/30 7/28+80/30 7/56+40/30 7/28+40/60 21/28+40/30 7/84+40/30 7/28+40/90 35/28+40/30 49/28+40/30