Add 12/21 and 2/5
12/21 + 2/5 is 34/35.
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,
12/21 = 12 × 5/21 × 5 = 60/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
2/5 = 2 × 21/5 × 21 = 42/105 - Add the two like fractions:
60/105 + 42/105 = 60 + 42/105 = 102/105 - 102/105 simplified gives 34/35
- So, 12/21 + 2/5 = 34/35
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