Add 28/15 and 21/45
1st number: 1 13/15, 2nd number: 21/45
28/15 + 21/45 is 7/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
28/15 = 28 × 3/15 × 3 = 84/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
21/45 = 21 × 1/45 × 1 = 21/45 - Add the two like fractions:
84/45 + 21/45 = 84 + 21/45 = 105/45 - 105/45 simplified gives 7/3
- So, 28/15 + 21/45 = 7/3
In mixed form: 21/3
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