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Add 90/70 and 60/21

1st number: 1 20/70, 2nd number: 2 18/21

90/70 + 60/21 is 29/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 21 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 70 × 3 = 210,
    90/70 = 90 × 3/70 × 3 = 270/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    60/21 = 60 × 10/21 × 10 = 600/210
  4. Add the two like fractions:
    270/210 + 600/210 = 270 + 600/210 = 870/210
  5. 870/210 simplified gives 29/7
  6. So, 90/70 + 60/21 = 29/7
    In mixed form: 41/7

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