Add 1/21 and 30/84
1/21 + 30/84 is 17/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
1/21 = 1 × 4/21 × 4 = 4/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
30/84 = 30 × 1/84 × 1 = 30/84 - Add the two like fractions:
4/84 + 30/84 = 4 + 30/84 = 34/84 - 34/84 simplified gives 17/42
- So, 1/21 + 30/84 = 17/42
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