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Add 72/30 and 70/21

1st number: 2 12/30, 2nd number: 3 7/21

72/30 + 70/21 is 86/15.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 30 × 7 = 210,
    72/30 = 72 × 7/30 × 7 = 504/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    70/21 = 70 × 10/21 × 10 = 700/210
  4. Add the two like fractions:
    504/210 + 700/210 = 504 + 700/210 = 1204/210
  5. 1204/210 simplified gives 86/15
  6. So, 72/30 + 70/21 = 86/15
    In mixed form: 511/15

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