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Add 21/30 and 90/7

1st number: 21/30, 2nd number: 12 6/7

21/30 + 90/7 is 949/70.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 30 × 7 = 210,
    21/30 = 21 × 7/30 × 7 = 147/210
  3. Likewise, for the 2nd fraction, since 7 × 30 = 210,
    90/7 = 90 × 30/7 × 30 = 2700/210
  4. Add the two like fractions:
    147/210 + 2700/210 = 147 + 2700/210 = 2847/210
  5. 2847/210 simplified gives 949/70
  6. So, 21/30 + 90/7 = 949/70
    In mixed form: 1339/70

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