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