Add 21/7 and 15/63
1st number: 3 0/7, 2nd number: 15/63
21/7 + 15/63 is 68/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
21/7 = 21 × 9/7 × 9 = 189/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
15/63 = 15 × 1/63 × 1 = 15/63 - Add the two like fractions:
189/63 + 15/63 = 189 + 15/63 = 204/63 - 204/63 simplified gives 68/21
- So, 21/7 + 15/63 = 68/21
In mixed form: 35/21
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