Add 1/21 and 3/5
1/21 + 3/5 is 68/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
1/21 = 1 × 5/21 × 5 = 5/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
3/5 = 3 × 21/5 × 21 = 63/105 - Add the two like fractions:
5/105 + 63/105 = 5 + 63/105 = 68/105 - So, 1/21 + 3/5 = 68/105
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