Add 7/28 and 63/15
1st number: 7/28, 2nd number: 4 3/15
7/28 + 63/15 is 89/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 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 15 × 28 = 420,
63/15 = 63 × 28/15 × 28 = 1764/420 - Add the two like fractions:
105/420 + 1764/420 = 105 + 1764/420 = 1869/420 - 1869/420 simplified gives 89/20
- So, 7/28 + 63/15 = 89/20
In mixed form: 49/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+63/15 7/56+63/15 7/28+63/30 21/28+63/15 7/84+63/15 7/28+63/45 35/28+63/15 7/28+63/75 49/28+63/15