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Add 1/21 and 28/30

1/21 + 28/30 is 103/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 21 × 10 = 210,
    1/21 = 1 × 10/21 × 10 = 10/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    28/30 = 28 × 7/30 × 7 = 196/210
  4. Add the two like fractions:
    10/210 + 196/210 = 10 + 196/210 = 206/210
  5. 206/210 simplified gives 103/105
  6. So, 1/21 + 28/30 = 103/105

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