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Add 21/70 and 90/48

1st number: 21/70, 2nd number: 1 42/48

21/70 + 90/48 is 87/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 48 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 70 × 24 = 1680,
    21/70 = 21 × 24/70 × 24 = 504/1680
  3. Likewise, for the 2nd fraction, since 48 × 35 = 1680,
    90/48 = 90 × 35/48 × 35 = 3150/1680
  4. Add the two like fractions:
    504/1680 + 3150/1680 = 504 + 3150/1680 = 3654/1680
  5. 3654/1680 simplified gives 87/40
  6. So, 21/70 + 90/48 = 87/40
    In mixed form: 27/40

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