Add 4/21 and 4/28
4/21 + 4/28 is 1/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
4/21 = 4 × 4/21 × 4 = 16/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
4/28 = 4 × 3/28 × 3 = 12/84 - Add the two like fractions:
16/84 + 12/84 = 16 + 12/84 = 28/84 - 28/84 simplified gives 1/3
- So, 4/21 + 4/28 = 1/3
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