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Add 21/7 and 20/30

1st number: 3 0/7, 2nd number: 20/30

21/7 + 20/30 is 11/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 7 × 30 = 210,
    21/7 = 21 × 30/7 × 30 = 630/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    20/30 = 20 × 7/30 × 7 = 140/210
  4. Add the two like fractions:
    630/210 + 140/210 = 630 + 140/210 = 770/210
  5. 770/210 simplified gives 11/3
  6. So, 21/7 + 20/30 = 11/3
    In mixed form: 32/3

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