Add 15/9 and 5/21
1st number: 1 6/9, 2nd number: 5/21
15/9 + 5/21 is 40/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
15/9 = 15 × 7/9 × 7 = 105/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
5/21 = 5 × 3/21 × 3 = 15/63 - Add the two like fractions:
105/63 + 15/63 = 105 + 15/63 = 120/63 - 120/63 simplified gives 40/21
- So, 15/9 + 5/21 = 40/21
In mixed form: 119/21
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